Question

Find the perimeter of semicircle diameter 21cm

Answer 1

Answer:

Perimeter of the semi circle = 22/7 × 21/2 cm = 33 cm.

Answer 2

Step-by-step explanation:

Given

diameter = 21 cm

Perimeter of semicircle = π*d

$= \pi \times d\\ = \frac{22}{7} \times 21 \\ = 22 \times 3 \\ = 66$

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