# Geometry calculators

Find circle length and area, rectangle perimeter and area.

## Circle

Area of circle equals πR^{2}:

Circle length equals 2πR:

## Rectangle

Area of rectangle equals a × b:

Perimeter of rectangle equals 2A + 2B:

Find circle length and area, rectangle perimeter and area.

Area of circle equals πR^{2}:

Circle length equals 2πR:

Area of rectangle equals a × b:

Perimeter of rectangle equals 2A + 2B: