Triangle Sum Theorem

Front

Will the following three angles form a triangle? 30°, 60°, 90°

Back

Yes, the sum of the angles is 180°.

Front

Angles that are exactly 90 degrees are called _____ ______.

Back

Right angles.

Front

Find the measure of each angle indicated: 50, 55, 60, 70

Back

55.

Front

Find the measure of each angle indicated: 50, 20, 29, 48

Back

48.

Front

A triangle has one angle that measures 75° and one angle that measures 19°. What is the measure of the third angle?

Back

86°.

Front

What is the Triangle Sum Theorem?

Back

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

Front

If one angle of a triangle is 60° and another is 70°, what is the third angle?

Back

50°.

Front

What type of triangle has one angle greater than 90°?

Back

Obtuse triangle.

Front

What type of triangle has all angles less than 90°?

Back

Acute triangle.

Front

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

Back

Each angle measures 60°.