To complete: the proof that if the exterior sides of two adjacent acute
Answer to Problem 13WE
Explanation of Solution
Given information: OA is perpendicular to OC
OA is perpendicular to OC . By the definition of perpendicular lines,angle AOC is 90 and by angle addition postulate, sum of adjacent angles AOB and BOC is equal to angle AOC.On substituting the value of angle AOC, you get, the sum of adjacent anglesAOB and BOC is 90 degree. When the sum of two angles are 90 degree then they are called complementary angles.
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