Geometry Vocabulary

1. Lines are ______ if they are always the same distance apart.
4. Having the same shape and size.
7. A straight object with no thickness that extends in both directions without end.
8. ______ angles are angles opposite each other when two lines cross
10. A primitive notion that models an exact location in the space, and has no length, width, or thickness
11. A ______ angle measures 180°.
13. ______ angles are angles that add to 180°.
16. The line or line segment that divides the angle into two equal parts
17. The figure formed when two lines or rays meet at a common point.

2. An ______ angle measures less than 90°.
3. Lines are ______ if they meet at a 90° angle.
5. An ______ angle measures greater than 90°.
6. The point on a line segment that is equal distance from either endpoint.
9. ______ pairs are adjacent angles that add to 180°.
12. A portion of a line connecting two points.
14. A ______ angle measures 90°.
15. A part of a line that has one endpoint and goes on without end in the other direction.