Isosceles Base Angles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What are the base angles in an isosceles triangle?

Back

The base angles are the angles opposite the equal sides of an isosceles triangle, and they are always equal.

Front

If one base angle of an isosceles triangle is 50 degrees, what is the measure of the other base angle?

Back

50 degrees.

Front

In an isosceles triangle, if the vertex angle is 80 degrees, what is the measure of each base angle?

Back

Each base angle measures 50 degrees.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is always 180 degrees.

Front

If the base angles of an isosceles triangle are both 60 degrees, what is the measure of the vertex angle?

Back

The vertex angle measures 60 degrees.

Front

How do you find the missing angle in an isosceles triangle?

Back

Subtract the sum of the two equal angles from 180 degrees.

Front

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

Back

The angles opposite the equal sides are equal.

Front

If the base angles of an isosceles triangle are 70 degrees, what is the value of the missing angle?

Back

40 degrees.

Front

What is the formula to find the vertex angle if the base angles are known?

Back

Vertex angle = 180 - 2(base angle).