If angle∠ a and angle∠ b are supplementary angles and angle∠ a is 18 times as large as angle∠ b, find the measures of angle∠ a and angle∠ b.

Because supplementary angles measure 180 degrees, and angle A is 18 times larger than angle B, all you need to do is divide 180 by 18 to get the measure of angle B, which is 10. That makes angle A 170 degrees. In summary, angle A is 170 degrees, and angle B is 10 degrees.

Let angle B be X that means angle A is 1st
18X + X = 180 degrees
19X = 180 degrees
X = 9.473 degrees
Angle A = 170.526 degrees
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