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densk [106]
4 years ago
9

Help find the measure of b

Mathematics
2 answers:
emmainna [20.7K]4 years ago
7 0

b= 81 degrees


Explanation:

A straight line is 180 degrees.

180 - 99 = 81

All the angles combined should be equal to 360, forming a circle.

raketka [301]4 years ago
7 0

In order to find angle b, we have to know what supplementary angles.

Supplementary angles are two angles that add up to 180°, or in other words, a straight line.

Angle b and the 99 degree angle are supplementary due to them creating a straight line when combined, so they add up to 180°.

To find angle b, subtract 99 degrees from 180.

<em>180 - 99 = </em><em>81</em>

Angle <em>b is </em>equal to 81 degrees.

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3 years ago
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