Question

find the angle which is 4 times its complement

Answer 1

Let one angle be x and another be 4x
4x + x = 90
5x = 90
x = 90/5 = 18 degrees
The angle required is 4x,
4x = 18 x 4 = 72 degrees

Answer 2

Let the no be x
Then
X=4(90-x)
x=360-4x
5x=360
x=360/5
x=72
Ans
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