Question

Calcule as circunferências em cada caso ​

Answer 1

d = 20 cm

C = πd

C = 20 * 3,14

C = 62,8 cm

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d = 16 cm

C = πd

C = 16 * 3,14

C = 50,24 cm

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r = 11 cm

C = 2πr

C = 2  * 3,14 * 11

C = 69,08 cm

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d = 40 cm

C = πd

C = 40 * 3,14

C = 125,6 cm