IXL - Find measures of complementary, supplementary, vertical, and adjacent angles (Geometry practice)

or

The measure of an angle is 154°. What is the measure of its supplementary angle?

°

ref_doc_title.

or

Learn with an example

question

The measure of an angle is 47°. What is the measure of its supplementary angle?

°

key idea

Supplementary angles have measures that add to 180°.

A

B

C

D

ABC and

CBD are supplementary angles.

solution

Since the angles are supplementary, their measures must add to 180°. Set up an equation and solve for n.

n

+

47°

=

180°

n

+

47°

−

47°

=

180°

−

47°

n

=

133°

The measure of the supplementary angle is 133°.

Looking for more? Try these:

Lesson: Complementary angles

Lesson: Supplementary angles

Lesson: Vertical angles

Lesson: Adjacent angles

or

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Not feeling ready yet? These can help:

C.3Identify complementary, supplementary, vertical, adjacent, and congruent angles

C.13Solve linear equations: mixed review

C.2Angle measures

Lesson: Complementary angles

Lesson: Supplementary angles

Lesson: Vertical angles

Lesson: Adjacent angles