Geometry Definitions

5. An angle that is 90 degrees
10. A triangle with no angles above 89 degrees
11. A triangle that has a 90 degree angle
12. The sum of the side lengths of a polygon
14. A closed two dimensional curved shape
16. Two angles that equal 180 degrees
18. An angle larger than 89 degrees and below 180 degrees
20. An angle smaller than 90 degrees
21. A quadrilateral whose opposite sides are parallel and whose opposite angles are congruent
22. The longest distance across a circle
25. A quadrilateral with 4 congruent sides and angles

1. The longest side of a triangle
2. A triangle with at least 2 congruent sides and angles
3. Having the same shape and size
4. Half of a circle
6. A tool used to measure degrees
7. A line segment whose endpoints are on the edge of a circle
8. Is straight, has no thickness,extends infinitely in both directions
9. A quadrilateral with two parallel bases and 2 congruent sides
13. A line segment that joins two vertices
15. A quadrilateral with 2 sets of congruent sides and 4 congruent angles
17. A quadrilateral with 4 congruent sides and whose diagonals perpendicularly bisect each other
19. A line outside of a circle that only touches it at one point
23. Half of the diameter of a circle
24. The unit used to measure angles