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Which property allows you to state if m4 + m5 = 59°, and m4 = 20°, then 20° + m5 = 59°??
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5 votes
Which property allows you to state if m4 + m5 = 59°, and m4 = 20°, then 20° + m5 = 59°??

User Jcvegan
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2 Answers

4 votes
The answer will be “ substitute ” because you replace angle 4 with 20°
Furthermore,
20°+m5=59°
Subtract 20° for both side
20°-20°+m5=59°-20°
m5=39°. As a result, substitute is the final answer. Hope it help!
User Gislef
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7.3k points
2 votes
Answer: Substitution Property

Think of "substitute" as in replacement. For example, your substitute teacher is a (temporary) replacement for your current teacher. In this case, we're replacing "m4" with "20 degrees".
User Gaurav Singhal
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6.6k points
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