Question

find the circumferential of a circle of diameter 21cm​

Answer 1

Step-by-step explanation:

Circumference = 2 × pi × r

= 2 × 22/7 × 21/2

= 924/14

= 66 cm

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Answer 2

Answer:

66 cm

Step-by-step explanation:

Circumference of Circle when diameter is given = π × d

Circumference of Circle when diameter is given = π × dso, value of π = 22÷7

Circumference of Circle when diameter is given = π × dso, value of π = 22÷7 value of d = 21 cm

Circumference of Circle when diameter is given = π × dso, value of π = 22÷7 value of d = 21 cmso, 22÷7×21

Circumference of Circle when diameter is given = π × dso, value of π = 22÷7 value of d = 21 cmso, 22÷7×21 = 22 × 3 = 66 cm