Isosceles and Equilateral Triangles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length. The angles opposite these sides are also equal.

Front

What is an equilateral triangle?

Back

Front

State the Isosceles Triangles Theorem.

Back

The Isosceles Triangles Theorem states that if two sides of a triangle are congruent, then the angles opposite those sides are congruent.

Front

What is the sum of the interior angles of a triangle?

Back

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Front

How do you find the measure of an angle in an isosceles triangle if you know the base angles?

Back

Front

What is the relationship between the sides and angles in an equilateral triangle?

Back

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Front

What is the Converse of the Isosceles Triangles Theorem?

Back

The Converse of the Isosceles Triangles Theorem states that if two angles of a triangle are congruent, then the sides opposite those angles are congruent.

Front

How do you calculate the third angle of a triangle if two angles are known?

Back