1. Warm-up

2. Legs: Congruent sides Of an isosceles triangle Base: Third side of an Isosceles triangle Vertex Angle: the angle the two legs form Base Angle: the angle formed by the leg and the base

3. If the two legs are congruent, then the base angles are congruent

4. The converse is also true. If _______________ are congruent, then _____________are congruent.

7. If we can prove a triangle to be isosceles, then we can prove two angles to be perpendicular, and we can prove that line of symmetry to be a midpoint.

8. What is the value of x?

11. When you are finished with your quiz… You are to work on Pg. 254 #6 – 13, 16-19