Supplementary and Complementary Angles
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Objective
I can calculate angle measures using the relationships of supplementary and complementary angles.
Part 1 of 4
Warm-up video
Mr. Ace Math · 11:25
We don't generate video — this one is by Mr. Ace Math on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Complementary angles are two or more angles that add up to exactly 90 degrees.
- 2
Supplementary angles are two or more angles that add up to exactly 180 degrees, forming a straight line.
- 3
To find the complement of an angle, subtract the given angle from 90 degrees; to find the supplement, subtract from 180 degrees.
Part 3 of 4
Practice
12 questions
What is the difference between complementary and supplementary angles?
If angle A is 52 degrees, what is the measure of its complement?
Part 4 of 4
Exit ticket
Quick comprehension check
“Angle ABC measures 32°. What is the measure of its complement? Angle XYZ measures 125°. What is the measure of its supplement?”
Sample answer included in the free materials
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Teacher Guide
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