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3 years ago

If (angle)A and (angle)B are supplementary, and m(angle)A = 57°, what is m(angle)B?

Mathematics

1 answer:

Sedbober [7]3 years ago

7 0

Answer:

123°

Step-by-step explanation:

Supplementary angles add up to be 180 degrees.

This means angles A and B will add up to be 180 degrees.

We can find the measure of angle B by subtracting 57 from 180

180 - 57

= 123

So, the measure of angle B is 123 degrees

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