Triangle Sum Theorem Classwork

Front

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

Back

180°

Front

What theorem tells us that all of the interior angles of a triangle add up to 180 degrees?

Back

Triangle Sum Theorem

Front

Find the measure of the missing angle if two angles are 70° and 60°.

Back

50°

Front

Find the measure of the missing angle if two angles are 80° and 70°.

Back

30°

Front

Find the measure of the missing angle if two angles are 75° and 50°.

Back

55°

Front

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

Back

60°

Front

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

Back

Right triangle

Front

In a triangle, if one angle measures 45°, what is the sum of the other two angles?

Back

135°

Front

If a triangle has angles measuring 30° and 60°, what is the measure of the third angle?

Back

90°

Front

What is the relationship between the angles of a triangle and the exterior angle?

Back

The exterior angle is equal to the sum of the two opposite interior angles.