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Relation between Radian and Degree

What fraction...

Question

What fraction of a straight line is a right angle?

\frac{1}{2}

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\frac{1}{3}

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\frac{1}{4}

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\frac{1}{6}

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Solution

The correct option is C $\frac{1}{2}$
Since one straight angle is $180^{o}$ .
and one right angle is $90^{o}$
Then fraction of right angle to straight angle is $\frac{90^{o}}{180^{o}} = \frac{1}{2}$

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