1. This or That or a. b. collinear coplanar
Three points that form a straight line are called… a.
collinear b.
coplanar or

2. This or That
Two lines intersect in a… a.
point b.
line or

3. This or That
Two planes intersect in a… a.
point b.
line or

4. This or That
Three non-collinear points define a… a.
plane b.
ray or

5. This or That or a. b. segment ray
A part of a line that has two endpoints… a.
segment b.
ray or

6. This or That or a. b. perpendicular parallel
Two lines in the same plane that never intersect are… a.
perpendicular b.
parallel or

7. This or That or a. b. perpendicular parallel
Two lines in the same plane that intersect at right angles… a.
perpendicular b.
parallel or

8. This or That or a. b. theorem postulate
A statement that we take to be true… a.
theorem b.
postulate or