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1. 1 Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms Russ Schultz and Larry Smith
PowerPoint presentation created by LaVonne Vichlach
2. 2 Dictionary of Terms Abrasive
A material used to cut other materials softer than itself.
3. 3 Dictionary of Terms Allowance
Or maximum interference
Occurs between two mating parts-e.g.. a shaft and a hole
4. 4 Dictionary of Terms Alloy
Mixture of two or more elements
One is metallic
Melt together to form new material
5. 5 Dictionary of Terms Angular Dimension
Dimension measured using
6. 6 Dictionary of Terms Anneal
Heat treat process
Cool heated material slowly
7. 7 Dictionary of Terms Arbor
Shaft that cutting tool is mounted on
Spindle that holds a workpiece
8. 8 Dictionary of Terms Assembly Drawing
Drawing that shows relationship of components that fit together
9. 9 Dictionary of Terms Auxiliary View
Orthographic view projected angularly
Shows features appearing on inclined surfaces
Shows features appearing on oblique surfaces
10. 10 Dictionary of Terms Axis
Central line about which parts are arranged
Elements may or may not revolve around it
11. 11 Dictionary of Terms Baseline dimensioning
System of dimensioning used to locate features of a part-e.g. holes
Uses a common set of datums
12. 12 Dictionary of Terms Basic dimension
Exact value of a feature-no tolerance is used
Describes the following:
13. 13 Dictionary of Terms Basic size
Exact theoretical size
Limits of size are derived from them by
Application of allowances
Application of tolerances
14. 14 Dictionary of Terms Bevel
Flat, slanted surface between two other surfaces
Surfaces are at right angles to one another
15. 15 Dictionary of Terms Bilateral
Bi means two
Indicates that two sides are used
16. 16 Dictionary of Terms Blind hole
Hole that does not go through all of the material
Common in thick parts
17. 17 Dictionary of Terms Bolt circle
Two or more hole centers are located on it
18. 18 Dictionary of Terms Bore
Process to enlarge a hole to an accurate size
Held to close tolerances
Usually specified with limit dimensions
19. 19 Dictionary of Terms Boss
Raised cylindrical projection-always circular
Provides extra metal around a hole in casting or forging
Similar to a pad-pad may be any other shape-function is same-provide more material
20. 20 Dictionary of Terms Broach
Process to produce desired shape in cylindrical hole
21. 21 Dictionary of Terms Broach
Series of teeth
Gradually increasing in size
Cutting is done as tool is pushed or pulled through hole
22. 22 Dictionary of Terms Burnish
Finish or polish metal
Roll or slide a tool over the surface under pressure
23. 23 Dictionary of Terms Burr
Jagged edge of metal produced by working the metal
Common note of blueprints is to remove all burrs
24. 24 Dictionary of Terms Bushing
Provide metal with better wearing quality
25. 25 Dictionary of Terms CAD drawing
Drawing created by computer-aided drafting methods
Electronically stored, revised and retrieved
26. 26 Dictionary of Terms Cam
Mechanical device used to change rotary motion to some other motion
Reciprocating or sliding
27. 27 Dictionary of Terms Carburize (CARB.)
Heat low-carbon steel to temperature below its melting point
Heated in carbonaceous solids, liquids, or gases to raise level of carbon on outside surfaces
28. 28 Dictionary of Terms Case hardening
Hardening of ferrous alloy
Surface layer is harder than the interior core
29. 29 Dictionary of Terms Casting
Metal object-e.g.-cast iron, cast aluminum
Pour molten metal into a mold
30. 30 Dictionary of Terms Chain dimensioning
Successive dimensions extend from one feature to another
Each dimension does not have to originate from a datum
Tolerances accumulate with a chain dimension
31. 31 Dictionary of Terms Chamfer
Corner removed from end of cylindrical surface
At an angle to face
Used to facilitate assembly
32. 32 Dictionary of Terms Clearance hole
Hole slightly larger than bolt or fastener
Bolt or fastener passes through it freely
Permits easy assembly
33. 33 Dictionary of Terms Coaxiality
Exists when two or more cylindrical features have a common axis
Two diameters on a shaft
Bore in a round part
34. 34 Dictionary of Terms Collar
Projecting ring around a shaft
Can be used to locate components on an arbor
35. 35 Dictionary of Terms Concentricity
Condition where median points of a features diametrically opposed elements are located within a cylindrical zone
Cylindrical zone is equally centered about a datum axis
36. 36 Dictionary of Terms Core
Part of a mold
Shapes the interior of a casting
Sand is major component
37. 37 Dictionary of Terms Counterbore
Process to enlarge a hole cylindrically at the end
Drawing specification includes:
Depth of enlarged section
38. 38 Dictionary of Terms Countersink
Process to enlarge a hole conically at end
Accept a flathead fastener
Drawing specifications will include its diameter and included angle
39. 39 Dictionary of Terms Datum
Location of other features is established using them
A datum can be:
40. 40 Dictionary of Terms Degree
Unit of angular measurement
360 degrees in a full circle
41. 41 Dictionary of Terms Detail drawing
Drawing of a single object completely dimensioned
All information necessary to produce part is on print
42. 42 Dictionary of Terms Die (multiple definitions)
Tool used to cut external threads
Tool used to:
43. 43 Dictionary of Terms Die castings
Metal object produced by injecting material into metal dies
Material injected into mold under pressure
44. 44 Dictionary of Terms Draft
Angle provide on pattern or mold
Enables easy removal of finished cast or molded part from tooling
45. 45 Dictionary of Terms Eccentric
Term means off center
Eccentric diameters do not share a common axis
46. 46 Dictionary of Terms Extrusion
Part produced can be a metal object
Process forces hot metal through dies of desired shape
47. 47 Dictionary of Terms Face
Lathe term-machine flat surface perpendicular to the axis of part
E.g.-the end of a shaft
48. 48 Dictionary of Terms Fastener
Connector used to secure two or more parts together
49. 49 Dictionary of Terms Ferrous
Metals containing iron as their base
E.g.steel, cast iron
50. 50 Dictionary of Terms Fillet
Concave surface (interior radius)
At intersection of two surfaces of an object
51. 51 Dictionary of Terms Fin
Thin projecting edge on cast or molded part
Common in castings and produced where mold halves come together
52. 52 Dictionary of Terms Finish marks
Symbols appearing on edge view of surfaces to be machined
Usually found on drawings of castings and forgings
53. 53 Dictionary of Terms Fixture
Device designed to position and hold a part in a machine tool
Does not guide cutting tool
References part to tool
54. 54 Dictionary of Terms Flame hardening
Process of hardening steel
Can use Oxyacetylene torch and quench material in quenching medium
55. 55 Dictionary of Terms Flange
Projecting rim or collar on an object
May include mounting holes to secure it in place
56. 56 Dictionary of Terms Forge
Force hot metal into a desired shape
Process includes hammering or squeezing
57. 57 Dictionary of Terms Gauge
The thickness of sheet metal or the diameter of wire
Designated by number rather than a dimension
58. 58 Dictionary of Terms Geometric tolerancing
Tolerances on drawings
Actual function or relationship of part features
Interchangeability is critical
59. 59 Dictionary of Terms Gusset
Angular piece of metal
Fastened in angle of metal frame to strengthen or add stiffness
60. 60 Dictionary of Terms Hardness test
Measures degree of hardness of metals
Uses numerical values for hardness
61. 61 Dictionary of Terms Heat treatment
Application of heat to metals
Produces a variety of desired properties depending on type of heat treat
62. 62 Dictionary of Terms Horizontal
Parallel to the horizon
Machine tool can be describe by this term-e.g.-horizontal mill
63. 63 Dictionary of Terms Hub
Central part of a wheel
Part into which spokes are inserted
64. 64 Dictionary of Terms Inclined surface
Flat surface slanting in one direction
Appears as an edge in one principal view
Appears distorted in others
65. 65 Dictionary of Terms Included angle
Angle formed between one side and another
Always less than 180
66. 66 Dictionary of Terms Isometric drawing
Three-dimensional pictorial drawing
Horizontal surfaces drawn on 30 axes from horizontal
67. 67 Dictionary of Terms Jig
Device used to hold a part to be machined
Positions and guides cutting tool
68. 68 Dictionary of Terms Key
Metal bar or wedge
Secures gears or pulleys to shaft
Prevents rotary motion between two pieces
69. 69 Dictionary of Terms Keyseat
An axially located groove in a shaft
Positions the key
70. 70 Dictionary of Terms Keyway
An axially located groove in a hub
Positions the key
71. 71 Dictionary of Terms Lap
Produce finished surface
Uses soft metal impregnated with a fine abrasive powder
72. 72 Dictionary of Terms Least material condition
Minimum amount of material is present
Maximum hole size
Smallest shaft size
73. 73 Dictionary of Terms Limits
Maximum and minimum permissible dimensions
Arrive at by applying tolerances to basic dimensions
74. 74 Dictionary of Terms Linear dimension
A dimension measured in a straight line
Most common of dimensions on part prints
75. 75 Dictionary of Terms Maximum material condition
Maximum amount of material is present
Smallest hole diameter
Largest shaft size
76. 76 Dictionary of Terms Neck
External groove in a cylindrical piece
Change in diameter
Usually generated where another part fits against a shoulder
77. 77 Dictionary of Terms Nominal size
Term used for purposes of general identification
E.g.3/4-in. plate or 1-in. pipe
78. 78 Dictionary of Terms Nonferrous
Metals that do no contain iron
79. 79 Dictionary of Terms Normalizing
Process of heating steel
Cool in still air to room temperature
Restore uniform grain structure and relieves internal stresses
80. 80 Dictionary of Terms Oblique surface
Flat surface slanting in two directions
Will appear distorted in all principal views
81. 81 Dictionary of Terms Orthographic projection
Process of projecting essential views of three-dimensional object onto flat plane
Used to generate machinists blueprints
82. 82 Dictionary of Terms Pad
Raised projection on a casting
Provides extra metal around series of holes or a slotted hole
83. 83 Dictionary of Terms Parallel
Extending in the same direction-e.g.-two lines
Equidistant at any point
Lines do not meet
84. 84 Dictionary of Terms Pattern
Model made of wood, metal, or other material
Used to form a cavity in sand for pouring castings
85. 85 Dictionary of Terms Perpendicular
Being at a right angle to a given line or plane
Or 90 to a given line or plane
86. 86 Dictionary of Terms Pickle
Process to remove stains or oxide from parts
Parts immersed in an acid solution
87. 87 Dictionary of Terms Pinion
In a gear assembly
The smaller of the two mating gears
88. 88 Dictionary of Terms Pitch
Distance from a point on a thread to a corresponding point on next adjacent thread
Measured parallel to the axis to the thread
89. 89 Dictionary of Terms Profile view
View that most clearly illustrates shape of a feature is considered profile view
With hole-it is view which shows it is round
90. 90 Dictionary of Terms Quenching
Cool metal rapidly
Immerse in water or oil
91. 91 Dictionary of Terms Radius
Distance from center of circle or an arc to its circumference
Equal to hone half of a diameter
Plural of radius is radii
92. 92 Dictionary of Terms Ream
Machine operation to enlarge a hole slightly
Use rotating fluted tool
Provides greater accuracy and better finish
93. 93 Dictionary of Terms Reciprocation
A straight-line, back and forth motion
Move in alternate directions
94. 94 Dictionary of Terms Reference dimension
Used only for information purposes
Does not receive standard print tolerances
Should not be used for production or inspection
95. 95 Dictionary of Terms Regardless of feature size
Condition where tolerance of position must be met irrespective of where the feature lies within size tolerance
RFS-is understood and never seen on a part print
96. 96 Dictionary of Terms Relief
Amount one plane surface sits below another plane
Usually provides clearance
97. 97 Dictionary of Terms Rib
A relatively thin flat member
Acts as a brace or support
98. 98 Dictionary of Terms Round
A convex surface (exterior radius)
At the intersection of two surfaces of a casting or forging
99. 99 Dictionary of Terms Scale
Refers to relative size of drawing and size of part
First number represents size of drawing
Second number represents size of part
Dimensions always represent size of part-not the print
100. 100 Dictionary of Terms Section
Interior view of an object
Drawn to expose features not otherwise visible
101. 101 Dictionary of Terms Serrated
Surface or edge having notches or sharp teeth
Aids in cutting
102. 102 Dictionary of Terms Shim
Thin piece of metal or other material
Placed between two marts to adjust the fit, level a part, etc.
Plastic shims are also used
103. 103 Dictionary of Terms Shoulder
Plane surface on a shaft
Normal to the axis
Formed by a different diameter
104. 104 Dictionary of Terms Spline
A raised area on a shaft (external) or hub (internal) parallel to the axis
Designed to fit into a recessed area of a mating part
105. 105 Dictionary of Terms Spotface
A process used to machine a round diameter on a rough surface
Found in castings around a hole
Provides good seating surface to nut or for head of bolt
106. 106 Dictionary of Terms Springs
107. 107 Dictionary of Terms Helical springs
Compression-supply force when compressed-either in hole or around rod
Extension-Supplies force when extended-pulled from end to end-has hooks on each end
Torsion-Designed to resist twisting or rotary motion-hooks or projections for connections
108. 108 Dictionary of Terms Stud
Round piece of metal
Threaded on both ends
109. 109 Dictionary of Terms Surface roughness
Refers to finely spaced irregularities produced in fabricating a part
Height of irregularities is rated in microinches or micrometers
110. 110 Dictionary of Terms Symmetrical
Same on each side
Centerline usually indicates symmetry
111. 111 Dictionary of Terms Tabular dimensioning
Type of dimensioning where letters are substituted for dimensions
Dimensions are listed in a table on a drawing
Permits more than one part to appear on the same drawing
112. 112 Dictionary of Terms Tangent
Line drawn to the surface of an arc or circle
Contacts the arc or circle at only one point
113. 113 Dictionary of Terms Tap
A tool for cutting threads in a hole
Hole is usually drilled to a particular size for threading operation
114. 114 Dictionary of Terms Taper
Conical shape that permits shaft or hole to become gradually smaller at one end.
Common application is tapered shank tools for machining centers
115. 115 Dictionary of Terms Temper
Change the physical characteristics of hardened steel
Reheat to intermediate temperature range to toughen steel
Also has softening effect
116. 116 Dictionary of Terms Template
Thin sheet used as a guide
Contains the form and shape of piece to be made
117. 117 Dictionary of Terms Tolerance
Permissible variation from a given dimension
118. 118 Dictionary of Terms Triangle
Three sides figure
180 in a triangle
119. 119 Dictionary of Terms Typical
Term used with drawing to indicate that all similar undimensioned features are same
Have same dimensions as the feature marked TYP (or typical)
120. 120 Dictionary of Terms Undercut
Groove cut on inside of another cut
Hole is an example
121. 121 Dictionary of Terms Unilateral
Having only one
Having only one side
Tolerances can be unilateral
122. 122 Dictionary of Terms Upset
To strike a piece of metal until it becomes greater in its cross section
Hammer metal into different shapes
123. 123 Dictionary of Terms Vertical
Perpendicular to the horizon
90 from the horizontal plane
124. 124 Dictionary of Terms Woodruff key
Flat key, semicircular in shape
Two basic dimensions coded into the key number
125. 125 Dictionary of Terms Woodruff key
Last two digits indicate diameter in 1/8ths of an inch
Preceding two digits designate width in 1/32nds of an inch
126. 126 Terminology Quiz 1 A machining operation that produces a round, flat spot around a hole. Abbreviated SF
127. 127 Terminology Quiz 1 A machining operation that uses a toothed cutting tool to produce shapes inside of a hole, such as a keyway.
128. 128 Terminology Quiz 1 The plural of radius.
129. 129 Terminology Quiz 1 The term that mean two sides are involved.
130. 130 Terminology Quiz 1 A tool used for cutting internal threads in a hole.
131. 131 Terminology Quiz 1 Two lines equidistant from each other, extending in the same direction.
132. 132 Terminology Quiz 1 The term that describes two lines or planes that are at right angles to one another.
133. 133 Terminology Quiz 1 A line drawn to an arc that contacts the arc at one point only, without crossing.
134. 134 Terminology Quiz 1 The thickness of steel metal by a number rather than a dimension.
135. 135 Terminology Quiz 1 A shaft or spindle for holding the cutting tool or workpiece.
136. 136 Terminology Quiz 1 A thin piece of metal inserted between two parts to adjust the fit.
137. 137 Terminology Quiz 1 The smaller of two mating gears.
138. 138 Terminology Quiz 1 A hole slightly larger than the fastener intended to pass through it.
139. 139 Terminology Quiz 1 A projecting rim or collar used to attach another object.
140. 140 Terminology Quiz 1 A flat surface perpendicular to the axis, such as the end of a shaft.
141. 141 Terminology Quiz 1 A point, line, or surface from where other features are located.
142. 142 Terminology Quiz 1 A spring designed to supply force when pulled end to end.
143. 143 Terminology Quiz 1 The cooling of metals rapidly by immersing them in a liquid.
144. 144 Terminology Quiz 1 A dimension used only for information, not for production or inspection.
145. 145 Terminology Quiz 1 A drawing made by computer-aided drafting methods.
146. 146 Terminology Quiz 2 A machining operation that enlarges the end cylindrically to a specified diameter and depth.
147. 147 Terminology Quiz 2 A machining operation that produces a cone-shaped end to a hole, usually to accept a flat-head fastener.
148. 148 Terminology Quiz 2 The permissible variation from a specified dimension.
149. 149 Terminology Quiz 2 The maximum and minimum permissible dimensions.
150. 150 Terminology Quiz 2 A tool for cutting external threads.
151. 151 Terminology Quiz 2 Cylindrical surfaces that are equally centered about a common axis
152. 152 Terminology Quiz 2 Equal halves. The same on both sides of a common centerline.
153. 153 Terminology Quiz 2 A circular centerline upon which two or more hole centers are located.
154. 154 Terminology Quiz 2 An object made by pouring molten metal into a mold.
155. 155 Terminology Quiz 2 A model of the part to be cast. Used to create a cavity in the sand.
156. 156 Terminology Quiz 2 An interior radius (concave) between intersecting surfaces of an object.
157. 157 Terminology Quiz 2 A circular, raised portion around a hole in a casting or a forging.
158. 158 Terminology Quiz 2 Metals that contain iron as their base material, such as steel.
159. 159 Terminology Quiz 2 Metals without iron content, such as brass, copper, or aluminum.
160. 160 Terminology Quiz 2 Conical shape that permits a shaft or hole to become gradually smaller from one end to the other.
161. 161 Terminology Quiz 2 To remove a small amount of material from the end of a shaft or hole to facilitate assembly.
162. 162 Terminology Quiz 2 A groove in a shaft to position a key.
163. 163 Terminology Quiz 2 An external groove at a change in diameter of a shaft, usually for another part to fit against its shoulder.
164. 164 Terminology Quiz 2 The term used to define the angle formed between one side and another.
165. 165 Terminology Quiz 2 The minimum clearance ( or maximum interference) between two mating parts, such as a shaft and a hole.
166. 166 Abbreviation Quiz 1 CI
167. 167 Abbreviation Quiz 1 CRS
168. 168 Abbreviation Quiz 1 CBORE
169. 169 Abbreviation Quiz 1 CSK
170. 170 Abbreviation Quiz 1 DIA
171. 171 Abbreviation Quiz 1 DR
172. 172 Abbreviation Quiz 1 FIL
173. 173 Abbreviation Quiz 1 FAO
174. 174 Abbreviation Quiz 1 GA
175. 175 Abbreviation Quiz 1 HRS
176. 176 Abbreviation Quiz 1 ID
177. 177 Abbreviation Quiz 1 LH
178. 178 Abbreviation Quiz 1 MATL
179. 179 Abbreviation Quiz 1 MAX
180. 180 Abbreviation Quiz 1 OD
181. 181 Abbreviation Quiz 1 SECT
182. 182 Abbreviation Quiz 1 STL
183. 183 Abbreviation Quiz 1 THK
184. 184 Abbreviation Quiz 1 THD
185. 185 Abbreviation Quiz 1 TOL
186. 186 Abbreviation Quiz 2 BC
187. 187 Abbreviation Quiz 2 BHN
188. 188 Abbreviation Quiz 2 CHAM
189. 189 Abbreviation Quiz 2 CDS
190. 190 Abbreviation Quiz 2 DIM.
191. 191 Abbreviation Quiz 2 FIN.
192. 192 Abbreviation Quiz 2 GRD
193. 193 Abbreviation Quiz 2 HT TR
194. 194 Abbreviation Quiz 2 LG
195. 195 Abbreviation Quiz 2 MI
196. 196 Abbreviation Quiz 2 MIN
197. 197 Abbreviation Quiz 2 NTS
198. 198 Abbreviation Quiz 2 PC
199. 199 Abbreviation Quiz 2 RM
200. 200 Abbreviation Quiz 2 REF
201. 201 Abbreviation Quiz 2 RND
202. 202 Abbreviation Quiz 2 SCR
203. 203 Abbreviation Quiz 2 SPEC
204. 204 Abbreviation Quiz 2 SYM
205. 205 Abbreviation Quiz 2 TYP
206. 206 Alphabet of Lines Visible line
Represents visible edges
Represents outlines of the object being drawn
207. 207 Alphabet of Lines Hidden line
Represents edges not visible in given view
Represents outlines of an object not visible in given view
208. 208 Alphabet of Lines Section lines
Appear only on a sectional view
Appears where surface has been cut
Normally drawn diagonally
209. 209 Alphabet of Lines Centerline
Indicates symmetry, center points, or axes
Consists of alternate long and short dashes
210. 210 Alphabet of Lines Dimension line
Denotes the extent of the dimension
Use with arrowheads
211. 211 Alphabet of Lines Extension line
Extends surface or point away from view
Used for the purpose of dimensioning
212. 212 Alphabet of Lines Leader
Directs a dimension or note to an area
Normally terminates with an arrow
May terminate with a dot
213. 213 Alphabet of Lines Cutting-plane line
Shows where imaginary cutting creates a sectional view
May be series of long dashes or alternately two short dashes between single long dashes
Arrowheads indicate the direction of sight
214. 214 Alphabet of Lines Viewing-plane line
Used in conjunction with removed views to show where view would normally appear
Arrowheads indicate direction of sight
215. 215 Alphabet of Lines Short break line
Terminates a view to conserve space and avoid congestion
Separates internal and external features with broken-out sections
216. 216 Alphabet of Lines Long break line
Allows removal of a long central portion of an object to shorten a view
Normally used in pairs
217. 217 Alphabet of Lines Phantom line
Represents the outline of an adjacent part
Shows alternate position of a given part
218. 218 Alphabet of Lines Phantom line
Replaces repetitive detail-e.g.-coils, gear teeth, threads
Drawn with two short dashes between single long dashes
Lines are thinner than the cutting/viewing-plane line
219. 219 Alphabet of Lines Chain line
Used to indicate an area or portion of a surface
Surface receives special treatment
220. 220 Alphabet of Lines
221. 221 Alphabet of Lines Drawn parallel to surface profile at a short distance from it
Dimensions added for length and location
222. 222 Alphabet of Lines Dimensions omitted when chain line clearly indicates location and extent of surface
223. 223 Alphabet of Lines Quiz 1 Shows the outline of the object.
224. 224 Alphabet of Lines Quiz 1 2. Indicates the place from where the removed view is viewed.
225. 225 Alphabet of Lines Quiz 1 3. Points diagonally to an area or a feature.
226. 226 Alphabet of Lines Quiz 1 4. Represents a surface not visible in the view drawn.
227. 227 Alphabet of Lines Quiz 1 5. Shows an alternate position of the movable arm.
228. 228 Alphabet of Lines Quiz 1 6. Terminates with arrowheads and encloses a dimension figure.
229. 229 Alphabet of Lines Quiz 1 7. Extends the visible line for the purpose of dimensioning to it.
230. 230 Alphabet of Lines Quiz 1 8. Indicates the place where the section is cut.
231. 231 Alphabet of Lines Quiz 1 9. Shows the axis of symmetrical parts and the arms path of motion.
232. 232 Alphabet of Lines Quiz 1 10. Permits the use of a partial view to conserve space and avoid congestion.
233. 233 Alphabet of Lines Quiz 1 11. Represents the exposed surface of a sectioned feature.
234. 234 Alphabet of Lines Quiz 1 12. List the five lines that are drawn thick.
235. 235 Alphabet of Lines Quiz 1 13. List the six lines that include short dashes.
236. 236 Alphabet of Lines Quiz 1 14. List the four lines that include arrowheads.
237. 237 Alphabet of Lines Quiz 1 15. How does the cutting-plane line differ from the viewingplane line (in application)?
238. 238 Alphabet of Lines Quiz 2 List the proper names of the lines used in the illustration.
241. 241 List the proper names of the lines used in the illustration.
242. 242 List the proper names of the lines used in the illustration.
243. 243 List the proper names of the lines used in the illustration.
244. 244 List the proper names of the lines used in the illustration.
245. 245 List the proper names of the lines used in the illustration.
246. 246 List the proper names of the lines used in the illustration.
247. 247 List the proper names of the lines used in the illustration.
248. 248 List the proper names of the lines used in the illustration.
249. 249 List the proper names of the lines used in the illustration.
250. 250 Alphabet of Lines Quiz 3 Match the lines with their correct names.
251. 251 Alphabet of Lines Quiz 3 Match the lines with their correct names.
252. 252 Alphabet of Lines Quiz 3 Match the lines with their correct names.
253. 253 Alphabet of Lines Quiz 3 Match the lines with their correct names.
254. 254 Alphabet of Lines Quiz 3 Match the lines with their correct names.
255. 255 Alphabet of Lines Quiz 3 Match the lines with their correct names.
256. 256 Alphabet of Lines Quiz 3 Match the lines with their correct names.
257. 257 Alphabet of Lines Quiz 3 Match the lines with their correct names.
258. 258 Alphabet of Lines Quiz 3 Match the lines with their correct names.
259. 259 Alphabet of Lines Quiz 3 Match the lines with their correct names.
260. 260 Alphabet of Lines Quiz 3 Match the lines with their correct names.
261. 261 Alphabet of Lines Quiz 3 Match the lines with their correct names.
262. 262 Alphabet of Lines Quiz 3 Match the lines with their correct names.
263. 263 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
264. 264 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
265. 265 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
266. 266 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
267. 267 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
268. 268 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
269. 269 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
270. 270 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
271. 271 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
272. 272 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
273. 273 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
274. 274 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
275. 275 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
276. 276 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.
277. 277 Alphabet of Lines Quiz 4 Match letters from the list with numbers in the illustration.