Question

find the circumference and area of a circle whose diameter is 21cm.

Answer 1

Answer:

here is your answer

Step-by-step explanation:

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Answer 2

Answer:

if diameter is 21 so radius = 10.5

first formula of circumference = πr²

so value π = 22/7

= 22/7 *10.5²

22/7*110.25 = 346.4

now area of circle= 2πr

2*22/7*10.5

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