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# Geometry Vocabulary Review - PowerPoint PPT Presentation

Geometry Vocabulary Review. Norton 4 th Grade. Point. Names an exact location in space. B. Line Segment. Part of a line with endpoints. C. D. End point. The points at either end of a line segment. C. D. Line. a straight path that continues in both directions with no end. X. Y.

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Geometry Vocabulary Review

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## Geometry Vocabulary Review

### Point

• Names an exact location in space

B

### Line Segment

• Part of a line with endpoints

C

D

### End point

• The points at either end of a line segment

C

D

### Line

• a straight path that continues in both directions with no end

X

Y

### Ray

• Part of a line with one end point and continues in the other direction with no end

R

Q

### Plane

• A flat surface that continues with out end in all directions

### Dimension

• A measurement along a straight line of a length, height, or width of a figure

### One dimensional

• A measure with only one direction such as length

### Two dimensional

• A measure with 2 dimensions, such as, height and width

### Angle

• Two lines or rays that share an endpoint

### vertex

• The shared endpoint of two lines or rays

### degree

• The unit used to measure angles

90 degrees

### Acute angle

• An angle less than 90 degrees

### Right angle

• A 90 degree angle

### Obtuse angle

• An angle more than 90 degrees

### Intersecting lines

• Lines that cross each other

### Parallel lines

• Lines that never intersect and are the same distance apart

### Perpendicular lines

• Lines that intersect at 90 degree angles

### dimension

• A measurement along the straight line of a length, height or width of a figure

### One dimensional

• A measure with only one direction such as length

### Two dimensional

• A measure with 2 dimensions, such as, height and width

### Three dimensional

• A measure with three dimensions, such as, height, width, and length

### clockwise

Moving in a circular path to the right – like the hands on a clock

### Counterclockwise

• Moving in a circular path to the left – opposite from a clock

### diagonal

• A line that has a slope or angle

### horizontal

• A flat line like the horizon, which is left to right

### Line of symmetry

• A line that divides a figure in half so that the 2 halves can be folded on top of each other

### reflection

• the movement of a figure to a new position by flipping the figure over

### rotation

• The movement of a figure by rotating the figure around a point

### transformation

• any movement of a figure (could be a translation, rotation or reflection)

### translation

• Moves a figure to a new position by sliding it

### symmetry

• Any shape that has symmetry has at least one line of symmetry

### vertical

• A line that goes straight up and down

### face

• Flat side of a figure

### edge

• Where two faces meet on a 3-D figure

### Vertex (vertices)

• Where three or more edges meet on a 3-D figure