1.

If the measure of an angle is twice the measure of its supplementary angle then the measure of the angle is ______.

Answer»

Let SUPPLEMENTARY angle MEASURE be x
The EQUATION is 2x+x = 180°(they are supplementary)
3X = 180°
x = 180°÷3
x = 60°
measure of angle is 2 times measure of supplementary angle.
angle = 2×60°
angle = 120°


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