This question was asked in Ex 5.3, 18

Circumference of 13th semicircle is 6.5 .Why?

Basant Ohlyan

Sept. 3, 2017, 5:05 p.m.

Answers!

Davneet Singh

Sept. 3, 2017, 9:10 p.m.

Hello Basant

Circumference of 1st semicircle = π × 1/2 = π × 0.5

Circumference of 2nd semicircle = π × 2/2 = π × 1

Circumference of 3rd semicircle = π × 3/2 = π × 1.5

............

Circumference of 13th semicircle = π × 13/2 = π × 6.5

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