Lessons 4.1, 4.2, 4.6 Recap

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

If one angle in a triangle is 80 degrees, what is the sum of the other two angles?

Back

The sum of the other two angles is 100 degrees.

Front

What is the value of x if the angles in a triangle are 51 degrees, x degrees, and 78 degrees?

Back

x = 51 degrees.

Front

What is the measure of an angle that is complementary to a 45-degree angle?

Back

The measure of the complementary angle is 45 degrees.

Front

If two angles are supplementary and one angle measures 67 degrees, what is the measure of the other angle?

Back

The other angle measures 113 degrees.

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose sum is 90 degrees.

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose sum is 180 degrees.

Front

Find the unknown angle if one angle is 20 degrees in a triangle.

Back

The sum of the other two angles is 160 degrees.

Front

If one angle in a triangle is 67 degrees and another is 80 degrees, what is the third angle?

Back

The third angle is 33 degrees.

Front

What is the measure of an angle that is supplementary to a 20-degree angle?

Back

The measure of the supplementary angle is 160 degrees.