Investigate algebraic applications of complementary angles. Young scholars watch as the instructor describes and defines complementary angles. He then shows an example of finding an unknown value of x given expressions for a pair of complementary angles.

Concepts

complementary angles, writing expressions, solving equations

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Additional Tags

math

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Instructional Ideas

• Use on a day that requires a substitute
• Follow with whiteboard practice as a quick understanding check

Classroom Considerations

• Expects previous work with solving equations

• This video is hosted on YouTube

Pros

• Provides a thorough explanation of solving each equation
• It's easy to play the video repeatedly until students understand the content
  

Cons

• None

Common Core

SL.7.2 SL.8.2 SL.9-10.2 7.G.B.5 RST.6-8.7 RST.9-10.7