1. Honors Geometry Section 4.4 Isosceles Triangle Theorem

2. Recall that an isosceles is a triangle with _________________
Recall that an isosceles is a triangle with _________________. The congruent sides are called the ____ and the noncongruent side is called the_____. The angle formed by the two legs is called the ___________ while the two angles at each end of the base are called ___________.
two congruent sides
legs
base
vertex angle
base angles

3. Theorem Isosceles Triangle Theorem (ITT) If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

4. Theorem Converse of the Isosceles Triangle Theorem (ITTC) If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

5. Examples: Solve for x.