IXL | Complementary and supplementary angles

The measure of an angle is 44°. What is the measure of its complementary angle?

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The measure of an angle is 85°. What is the measure of its complementary angle?

Complementary angles have measures that add to 90°.

ABC and

CBD are complementary angles.

Since the angles are complementary, their measures must add to 90°. Set up an equation and solve for n.

85°

90°

85°

−

85°

90°

−

85°

5°

The measure of the complementary angle is 5°.

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