Exploring Complementary and Supplementary Angles
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Objective
I can apply the properties of complementary and supplementary angles to solve geometric problems.
Part 1 of 3
Key concepts
3 concepts
- 1
Complementary angles are two angles whose measures add up to 90 degrees.
- 2
Supplementary angles are two angles whose measures add up to 180 degrees.
- 3
Recognizing complementary and supplementary angle relationships allows you to set up equations and solve for unknown angles.
Part 2 of 3
Practice
12 questions
Define complementary angles and provide an example.
Define supplementary angles and provide an example.
Part 3 of 3
Exit ticket
Quick comprehension check
“Angle P and angle Q are supplementary. If m∠P = 115°, find m∠Q.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
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