Calculate the area and the circumference of a circle with c programming

Question

Can you please help me???

Answer 1

import math module in c
Than take radius from user and use following formula
int area = PI*pow(radius,2);

Answer 2

Use the math formulas.

Answer 3

The formula is:
A=π*r^2 for area
C=2*π*r for circumference

Answer 4

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Answer 5

no.

Answer 6

You can default provide the Pi value and do simple calculation using formula.

Answer 7

you know the formula ?

Answer 8

Use the formulas and fit in the code
Area=πr^2
Circumference=2πr

Answer 9

Take pie to be 3.142