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Complementary Angles - the definition

What are complementary angles? Find out here.

 

Take a look at the figure to the right. Move the points around and notice how the angles change.

What is the relationship between the red and green angle?

How does this explain what complementary angles are?

Scroll down to find out...

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Duane Habecker, Created with GeoGebra

 

 

 

 

Complementary Angles

Two angles are complementary if they have a sum of 90°.

 

 

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