Geometry Vocabulary

4. two angles that are adjacent and are also supplementary because they form a line
6. two angles that are across from each other when two lines intersect
8. two angles that add up to 180 degrees
10. an angle that is exactly 90 degrees
12. two angles that are next to each other and share a common side
14. three or more points on the same line
16. part of a line consisting of two endpoints and all point between them
17. a line, ray or segment that is meets a line segment at a right angle at its midpoint

1. an angle that measures exactly 180 degrees
2. two angles that add up to 90 degrees
3. an angle that is greater than 90 degrees and less than 180 degrees
5. a ray that cuts an angle into two congruent pieces
7. part of a line that starts at an endpoint and extends forever in one direction
9. two lines, rays or segments that meet at a right angle
11. an angle that measures greater than 0 degrees and less than 90 degrees
13. a straight path that has no thickness and extends forever in both directions
15. figures that lie on the same plane