Answer
Angle: 51 degrees
Complement: 39 degrees
Work Step by Step
Let x be the measure of the angle's complement.
Thus, x+12 will the angle.
x+ (x+12) = 90
Solving algebraically,
2x +12 =90
2x= 90-12
2x=78
x=39
The angle will be x+12 = 39+12= 51.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 10 - Geometry - 10.1 Points, Lines, Planes, and Angles - Exercise Set 10.1 - Page 616: 21
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