Triangle angle sum theorem

Front

What does the Triangle Angle Sum Theorem state?

Back

The Triangle Angle Sum Theorem states that the sum of all angles in a triangle is 180°.

Front

If one angle of a triangle is 90° and another is 45°, what is the measure of the third angle?

Back

The third angle measures 45°.

Front

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

Back

Each angle in an equilateral triangle measures 60°.

Front

In a triangle, if two angles measure 30° and 60°, what is the measure of the third angle?

Back

The third angle measures 90°.

Front

If the angles of a triangle are represented as x, 2x, and 3x, what is the value of x?

Back

x = 30°, so the angles are 30°, 60°, and 90°.

Front

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

Back

In a right triangle, one angle is 90°, and the sum of the other two angles is 90°.

Front

If one angle of a triangle is 70° and another is 50°, what is the measure of the missing angle?

Back

The missing angle measures 60°.

Front

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

Back

The sum of the interior angles of a triangle is always 180°.

Front

In a triangle, if one angle measures 100°, what can you say about the other two angles?

Back

The other two angles must sum to 80°.

Front

If a triangle has angles measuring 40° and 70°, what is the measure of the third angle?

Back

The third angle measures 70°.