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Question
What fraction of a straight angle is a right angle?
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Solution
We know that, measures of right angle and straight angle are 90° and 180°
Now, the fraction of right angle to the straight angle = `90^circ/180^circ`
= `(90 ÷ 90)/(180 ÷ 90)` ...[∵ HCF of 90 and 180 is 90]
= `1/2`
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