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.

Front

What is the property of base angles in an isosceles triangle?

Back

The base angles in an isosceles triangle are 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

How do you find the vertex angle of an isosceles triangle?

Back

The vertex angle can be found by subtracting the sum of the base angles from 180 degrees.

Front

If the base angles of an isosceles triangle are both 40 degrees, what is the vertex angle?

Back

100 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

In an isosceles triangle, if the base angles are 65 degrees, what is the value of x in the equation x + 65 + 65 = 180?

Back

x = 50.

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 lengths of the equal sides of an isosceles triangle are 10 cm, what can be said about the triangle?

Back

It is isosceles, and the base can be any length less than 20 cm to maintain a triangle.