# Chapter 10 - Geometry - 10.1 Points, Lines, Planes, and Angles - Exercise Set 10.1: 10

$m\angle{HAE}= 90^o$ The angle is a right angle.

#### Work Step by Step

point E is at $90^o$ point H is at $180^o$ Thus, $m\angle{HAE} =180^o-90^o=90^o$ Thus, $\angle{HAE}$ is a right angle.

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