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Proving Theorems about Isosceles Triangles (5.6.2)

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Presentation on theme: "Proving Theorems about Isosceles Triangles (5.6.2)"— Presentation transcript:

1 Proving Theorems about Isosceles Triangles (5.6.2)
May 19th, 2016

2 Isosceles Triangles Definition: An isosceles triangle has two congruent sides, called legs.

3 Isosceles Triangle Theorem
If a triangle is isosceles, then it has congruent base angles.

4 Proof of the Isosceles Triangle Theorem
Given: is isosceles.

5 Converse of the Isosceles Triangle Theorem
If a triangle has two congruent angles, then the triangle is isosceles.

6 Equilateral Triangles
Definition: An equilateral triangle is a triangle with three congruent sides. *Equilateral triangles are equiangular, and vice versa.

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