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Multiple choice

In an arc forms 72o at the centre of the circle, then the ratio of its length to circumference of circle is-

  1. 1 : 5

  2. 1 : 2

  3. 1 : 3

  4. 1 : 4

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A 72° arc is 72/360 = 1/5 of a full circle. Since arc length is proportional to its central angle, the ratio of arc length to circumference is 1:5. Option A is correct.

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