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Find the measure of the missing angle

Find the measure of the missing angle-example-1
User As As
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The line is straight, so the 2 angles have to equal 180. Since we already know one angle is 21 degrees, we can subtract that from 180 to find the measure of the second angle. 180-21=159
So the measure of the other angle is 159 degrees.
User Rahul Panwar
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