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Angles of a Right Triangle

Interact with the applet below for a few minutes. Then answer the questions that follow.

In the applet above, what is the measure of the gray angle? How do you know this?

What is the sum of the measures of the 2 acute angles of this triangle?

What vocabulary term (adjective, really) describes the relationship between the pink angle and blue angle?

Fill in the blanks with appropriate responses to make a true statement! The 2 __________ angles of a ____________ triangle are ______________________!