# Changing a Circle to a Square

Its like magic to change a circle into a square, click the button and poof there you have it!!

This calculator converts the area of a circle into a square with four even length sides and four right angles. The calculation is based on the area of the square being the same as the circle's area.

#### Calculation

- enter the diameter of a circle
- number of decimal places required in results
- number of digits after the decimal point

#### Results

- radius of the circle
- the area of the circle
- the perimeter of the circle (circumference)
- side of the square's length
- perimeter of the square

### 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

### Square Formula's

**Area**
Area = length * length

**The square side length ***(calculated from the circle's area)*
side length = √ (A)

where A = the area of the circle

**Perimeter**
perimeter = length * 4

### Area and Perimeter of Various Shapes

### Changing the shape of an Area

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