area of circle?

since you didnt specify your question, I assume u want the formula.
area of circle is piR^2
The radius(R) of a circle is the distance between the midpoint of the circle and the circumference of the circle. The radius of a circle is the same no matter where on the circumference of the circle you measure from.
For pi, you can use either 3.142 or your calculator value.

yup everyone above is right, pi= 3.14...

3.14 x r( radius) squared.

a = πr^2
(area = pi * radius * radius)

for the area you can use pi * r *r ( pi * radius * radius)

or pi*r^

pi can either be

3.142

or

22/7

If r is radius then :-
A = π r²

The area of a circle is Pi R^2

where Pi = 3.14

R = radius

pi radius squared

pi is 3.14
so its 3.14 x radius by the power of 2