How to calculate an area of a circle

Question

I need to calculate the area of a circle using import.math

Answer 1

Area=Math.PI×Math.pow(radius, 2);

I think this is more correct...

Answer 2

area=π×Math.pow(radius);

Answer 3

The best way to calculate this (I think) is to use the area of a circle most math import packages include a pi value

Answer 4

pie*r*2*2
thats mean pie multiply by square of radius...