Honors Geometry Section 4.4 Isosceles Triangle Theorem

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Presentation transcript:

Honors Geometry Section 4.4 Isosceles Triangle Theorem

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

Theorem 4.4.1 Isosceles Triangle Theorem (ITT) If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

Theorem 4.4.2 Converse of the Isosceles Triangle Theorem (ITTC) If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

Examples: Solve for x.