Question

Find the perimeter of a semicircle if its diameter is 7.8cm

Answer 1

find the radius , i.e. , diameter divided by 2.
then to find perimeter , formula is =half*π*r*r

Answer 2

$p = \frac{1}{2} π × d$

$p = \frac{1}{2} × \frac{22}{7} × 7.8$

$p = \frac{22}{14} × 7.8$

$p = \frac{11}{7} ×7.8$

$p = \frac{85.8}{7}$

$p = 12.25cm (approximately)$

Thanks...!!!

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