An angle is one – fifth of its supplement. The measure of the angle isA. 15°B. 30°C. 75°D. 150°

Let x be the common multiple.

According to question,

y= 5x

As we know that sum of two supplementary – angles is 180o.

So, x + y = 180o

x + 5x= 180

6x = 180o

x = 30o

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