Basic Vocabulary

3. intersecting at a 90 degree angle
4. an angle which measures less than 90 degrees
5. two angles which add to 180 degrees
7. a piece of a line with two distinct endpoints
9. two angles which add to 90 degrees
11. two rays with a common initial point but opposing directions
13. two nonadjacent angles which are formed by intersecting lines
16. the same distance
17. on the same plane
18. the point of intersection of the three perpendicular bisectors in a triangle
19. a pair of adjacent supplementary angles

1. the point of intersection of the three angle bisectors in a triangle
2. a line or line segment which intersects a line segment at a 90 degree angle and divides the line segment into two equal parts
4. a ray which divides an angle into two equal parts
6. the point of origin of the two sides of an angle
8. a piece of a line with one distinct endpoint
10. two angles which share a common side
12. an angle which measure more than 90 degrees
14. an angle which measures 90 degrees
15. Geometrically Equal in terms of both size and shape
18. on the same line