Chapter 4

3. if two sides of a triangle are congruent, then the angles are opposite those sides are congruent
5. contains one right angle
8. is a triangle that has at least two congruent sides
12. is a triangle whose angles are all congruent
13. the angles and the sides of a triangle
16. the congruent sides of an isosceles triangle
17. may have a common side or angle
18. what the two congruent legs form
19. you can use this theorem as a reason for proof
20. is a triangle whose sides are all congruent

1. if there is an isometry that maps the figure onto itself
2. the other two angles
4. if two angles of one triangle are congruent, then the third angle is congruent
6. always “points” to the hypotenuse
7. is a triangle whose sides are all congruent
9. if two angles of a triangle are congruent, then the sides opposite those are congruent
10. there are two right triangles; the triangles have congruent hypotenuse; there is one pair of congruent legs
11. the third side of the isosceles triangle
14. have congruent corresponding parts - their matching sides and angles
15. the side opposite the right triangle in a triangle