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Mathematics 16 Online
OpenStudy (anonymous):

Calculate the measure of the exterior angle.

OpenStudy (anonymous):

OpenStudy (anonymous):

sum of 2 angle =exterior angles

jimthompson5910 (jim_thompson5910):

the two interior angles add to the exterior angle, so we can say (interior angle 1) + (interior angle 2) = exterior angle (3x+20) + (4x+5) = 8x + 15 solve for x, then use this to evaluate 8x+15

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