#### Answer

The first step of this given statement is, "$m \angle 2 \lt 90$."

#### Work Step by Step

An indirect proof starts off by negating what we want to prove.
The first step of this given statement is, "$m \angle 2 \lt 90$."

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Published by
Prentice Hall

ISBN 10:
0133281159

ISBN 13:
978-0-13328-115-6

The first step of this given statement is, "$m \angle 2 \lt 90$."

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