Finding Supplementary Angles
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Lesson Description:
Learn about supplementary angles -- what they are and how to identify them.
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.
Questions answered by this video:
- What are supplementary angles?
- How can you find supplementary angles?
- How do you find the measures of angles x and y if the measure of angle x is three-fifths the measure of angle y and if x and y are supplementary angles?
- What is the clearing fraction approach?
- How do you solve 3/5 y + y = 180?
- How do you solve 3y + 5y = 900?
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Staff Review
This lesson uses a geometric angle situation to set up and solve an algebraic equation to find the measures of the two angles. This is a good beginner problem if you are just learning to relate algebra equations to geometric situations.
