Isosceles Triangles - Concept

Concept Concept (1)

Isosceles triangles have at least two congruent sides and at least two congruent angles. The congruent sides, called legs, form the vertex angle. The other two congruent angles are the base angles. Isosceles triangles are used in the regular polygon area formula and isosceles right triangles are known as 45-45-90 triangles.

Sample Sample Problems (3)

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Isosceles Triangles - Problem 1
Problem 1
How to solve for the side length and base angle measures of an isosceles triangle.
Isosceles Triangles - Problem 2
Problem 2
How to solve for the measure of the vertex angle of an isosceles triangle given an exterior angle.
Isosceles Triangles - Problem 3
Problem 3
How to solve for a variable used to measure the angles of an isosceles triangle.