App description

Calculation formula of circumference length:

\(C=2πr\)

\(C=πd\)

Circular area calculation formula:

\(S=πr^2\)

\(S=π(d/2)^2\)

Usage example

Value >>> What is the number "2"?

Click on "Radius?"

Output Data:

When radius = 2;

Then this circle

Diameter = 4

Perimeter=1.566

Area=12.566