jstOrvsand jstOrvsand

25-09-2016
Mathematics

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angle def and angle feg are supplementary. the measure of angle def = (9x 1) and the measure of angle feg = (8x 9). what is the measure of angle feg? 89º 91º 9º 1º

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nobillionaireNobley nobillionaireNobley

28-09-2016

The sum of supplementaly angles is 180 degrees.
9x + 1 + 8x + 9 = 180
17x + 10 = 180
17x = 180 - 10 = 170
x = 170/17 = 10

Angle feg measures 8(10) + 9 = 80 + 9 = 89°

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