Isosceles & Equilateral Triangles

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Presentation transcript:

Isosceles & Equilateral Triangles

Isosceles Triangle Theorem How would you say this in words?

Isosceles Triangle Theorem Two sides of a triangle are congruent if and only if the angles opposite them are congruent.

If 2 sides , then 2 angles . If 2 angles , then 2 sides .

The first part is sometimes stated as … The base angles of an isosceles triangle are congruent.

A line that bisects the vertex angle of an isosceles triangle is perpendicular to the base.

A triangle is equilateral if and only if it is equiangular.

Isosceles Triangle Theorem Equilateral  Equiangular