Angles in Triangles

Front

What is the sum of the angles in a triangle?

Back

180 Degrees

Front

If two angles in a triangle are 47° and 86°, what is the measure of the third angle?

Back

47°

Front

What is the measure of an angle that is complementary to a 90° angle?

Back

0° (since complementary angles add up to 90°)

Front

What is the measure of an angle that is supplementary to a 133° angle?

Back

47° (since supplementary angles add up to 180°)

Front

In a triangle, if one angle measures 90°, what type of triangle is it?

Back

Right triangle

Front

If a triangle has angles measuring 60°, 60°, and 60°, what type of triangle is it?

Back

Equilateral triangle

Front

What is the measure of each angle in an isosceles triangle if the two equal angles are 70°?

Back

70° and 40° (the third angle is 40°)

Front

If one angle in a triangle measures 45° and the other measures 45°, what is the measure of the third angle?

Back

90°

Front

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

Back

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

Front

If a triangle has angles measuring 30°, 60°, and 90°, what is the name of this triangle?

Back

Right triangle