Undefined Terms and Definitions. Undefined Terms. Point simply a location represented by a dot named with a capital letter no shape no size. Undefined Terms (cont.). Line made up of points no thickness or width drawn with an arrowhead at each end
Undefined Terms and Definitions
SL or LS
Collinear - points on the same line
Coplanar - points that lie on the same plane
Intersection – The point(s) in common among figures
Space – A boundless three-dimensional set of all points.Space can contain lines and planes.
Locus – A set of points that all satisfy a particular condition.
Use the figure to name each of the following.
a. a line containing point X
Answer: line c,
b. a plane containing point Z
Answer:plane P, plane XYZ, plane ZYX, plane YZX, plane XZY, plane ZXY, plane YXZ
VISUALIZATION Name the geometric shape modeled by each object.
a. a colored dot on a map used to mark the location of a city
b. the ceiling of your classroom
a. How many planes appear in this figure?
b. Name three points that are collinear.
Sample answer:A, X, and Z
c. Are points X, O, and R coplanar? Explain.
Answer: Points X, O, and R all lie in plane T, so they are coplanar.
d. At what point do and intersect?