L7S3 Triangle sums

Front

What is the Triangle Sum Theorem?

Back

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

Front

If one angle of a triangle is 60° and another is 90°, what is the measure of the third angle?

Back

The third angle measures 30°.

Front

Solve for x: 2x + 30 = 180

Back

x = 75.

Front

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

Back

Each angle measures 60°.

Front

If two angles of a triangle are 45° and 55°, what is the measure of the third angle?

Back

The third angle measures 80°.

Front

Solve for x: x + 40 + 100 = 180

Back

x = 40.

Front

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

Back

The sum is 180°.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

Find the measure of the missing angle: 70° + x + 40° = 180°

Back

x = 70°.

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle are supplementary, meaning they add up to 180°.