Question

Find the circumference of a circle whose diameter is 66 cm​

Answer 1

Answer:

207.35

Step-by-step explanation:

C = πd = π×66 ≈ 207.34512

Answer 2

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$radius = \frac{diameter}{2} \\ \\ So........ \\ radius = \frac{66}{2} cm\\ radius = 33 \: cm \\ \\ circumfrence = 4\pi {r}^{2} \\ \\ So.......... \\ circumfrence = 4 \times \frac{22}{7} \times {33}^{2} \: cm \\ = 4 \times \frac{22}{7} \times 33 \times 33 \: cm\\ = 13,690.285 \: cm \\ \\ Therefore, circumfrence \: of \: the \: circle \: is \: 13,690.285 \: cm$