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Question

Supplement of an angle is one fourth of itself. The measure of the angle is :

A
18o
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B
36o
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C
144o
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D
72o
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Solution

The correct option is C 144o
Let one angle be xo. Then, another angle is x4o.

Thus, x+x4=180o

5x=180×4
x=180×45=144o

Thus, the required angles are 144o,36o.

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