Supplementary Angles

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If one angle measures 128 degrees, what is the measure of its supplementary angle?

Back

52 degrees (180 - 128 = 52).

Front

If one angle measures 120 degrees, what is the measure of its supplementary angle?

Back

60 degrees (180 - 120 = 60).

Front

If one angle measures 59 degrees, what is the measure of its supplementary angle?

Back

121 degrees (180 - 59 = 121).

Front

If one angle measures 141 degrees, what is the measure of its supplementary angle?

Back

39 degrees (180 - 141 = 39).

Front

If one angle measures 29 degrees, what is the measure of its supplementary angle?

Back

151 degrees (180 - 29 = 151).

Front

What is the sum of the measures of two supplementary angles?

Back

The sum is always 180 degrees.

Front

Can two angles be supplementary if both are acute?

Back

No, because the maximum measure of an acute angle is less than 90 degrees, and two acute angles cannot add up to 180 degrees.

Front

Can one angle be supplementary to itself?

Back

No, because an angle cannot measure more than 90 degrees to be supplementary to itself.

Front

What is the relationship between complementary and supplementary angles?

Back

Complementary angles add up to 90 degrees, while supplementary angles add up to 180 degrees.