Warm-up. Legs: Congruent sides Of an isosceles triangle Base: Third side of an Isosceles triangle Vertex Angle: the angle the two legs form Base Angle:

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Presentation transcript:

Warm-up

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

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

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

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.

What is the value of x?

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