# Changing a Circle to a Rectangle

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

- enter the diameter of a circle
- the width of the rectangle
- decimal precision, the number of digits after the decimal point

#### Results

- radius of the circle
- the area of the circle
- the perimeter of the circle (circumference)
- the length of the rectangle
- 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

### Area and Perimeter of Various Shapes

### Changing the shape of an Area

### Acreage or Building Lot Calculators

### Stadium Calculators