Triangle Sum Theorem

Front

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

Back

180°

Front

Find the measure of the indicated angle if the other two angles are 135° and 45°.

Back

45°

Front

Solve for x in the triangle where the angles are 90°, 45°, and x.

Back

6

Front

Which set of angles can form a triangle? 1) 45°, 65°, 70° 2) 150°, 110°, 100° 3) 50°, 50°, 50° 4) 90°, 90°, 90°

Back

45°, 65°, 70°

Front

Find the measure of the indicated angle if the other two angles are 30° and 25°.

Back

25°

Front

What is the measure of the third angle in a triangle if the other two angles are 50° and 60°?

Back

70°

Front

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

Back

Right triangle

Front

What is the sum of the angles in any triangle?

Back

180°

Front

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

Back

90°

Front

In a triangle, if one angle measures 120°, what can you say about the other two angles?

Back

They must each be less than 60°.