If an arc subtends an angle of 90° at the centre of a circle, the ratio of its length to the circumference of the circ... | MCQ 1m | Maths | SuperPadhai

Areas Related To Circles > Question

MCQ1 markYear: 2024EasyCBSE Class 10

areas-related-to-circlesarc-lengthratio

Question

If an arc subtends an angle of

90°

at the centre of a circle, the ratio of its length to the circumference of the circle is:

Solution

1

Arc length

= \frac{90}{360} \times 2 π r = \frac{1}{4} \times 2 π r

. Ratio

= \frac{1}{4} : 1 = 1 : 4

+1 mark

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