Convert the area of a circle into a rectangle-shaped area of the same size(the rectangle results have the same area as the circle). You must enter the rectangle's width and the circle's diameter.

Calculation

1. enter the diameter of a circle
2. the width of the rectangle
3. decimal precision, the number of digits after the decimal point

Results

1. radius of the circle
2. the area of the circle
3. the perimeter of the circle (circumference)
4. the length of the rectangle
5. perimeter of the rectangle

Circle Formula's

Radius

R = D ÷ 2

where R = radius, D = diameter

Area;

A = π * D² ÷ 4

where A = area, π = 3.14159..., D = diameter

Circumference;

C = 2 * π * D ÷ 2

where C = circumference, π = 3.14159...., D = diameter

Rectangle Formula's

Area

A = length * width

Length

L = A ÷ W

where L= length, A = area, W = width

Perimeter

P = length * 2 + width * 2