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Complementary Angles

In the applet below, the pink angle and the blue angle are said to be complementary angles. Interact with this applet for a minute or two, and answer the questions that appear below it.


In your own words, describe what it means for 2 angles to be complementary angles.


In the applet above, the blue angle is said to be a complement of the pink angle, and vice versa. Given this information, determine the complement of a 40 degree angle.


What is the complement of a 1-degree angle?


What angle measure has a complement whose measure is equal to itself?