Triangle Sum Theorem

Front

What does the Triangle Sum Theorem state?

Back

The sum of all angles in a triangle is 180°.

Front

If one angle of a triangle measures 90°, what can you say about the other two angles?

Back

The other two angles must sum to 90°.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle measures 60°.

Front

If a triangle has angles measuring 30° and 110°, what is the measure of the third angle?

Back

The third angle measures 40°.

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

Front

What is the measure of the third angle in a triangle if the first two angles are 50° and 80°?

Back

The third angle measures 50°.

Front

In a triangle, if one angle measures 37° and another measures 81°, what is the measure of the third angle?

Back

The third angle measures 62°.

Front

What is the sum of the angles in any triangle?

Back

180°.

Front

If a triangle has two equal angles, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is the relationship between the angles in a right triangle?

Back

One angle measures 90°, and the sum of the other two angles is 90°.