# Area and Perimeter

# Semicircle

Calculate the area and perimeter (circumference) of a semicircle. This calculator uses feet and or inches for measurements.

Semicircle = a circle cut in half along its diameter

### Semicircle Area and Perimeter

#### Calculation

- side length in feet and or inches
- decimal precision, the number of digits after the decimal point

#### Results

- the length of the arc in feet
- the area of the semicircle in decimal square feet
- area in square feet and inches
- the area in decimal square inches
- the area in square inches
- the area in square metres
- the perimeter of the semicircle in decimal feet
- the perimeter in lineal feet and inches
- the perimeter in decimal inches
- the perimeter in inches
- the perimeter in metres

##### Formula

A = 𝝅/4D²/2;
P = 𝝅D/2+D
where A is the area of the semicircle
𝝅= 3.14159265
D the diameter
P the circumference of the semicircle

##### Conversions

one square foot ( ft²) = 144 square inches (in²)
one square inch (in²) = 0.00694444444444443 square feet (ft²)
one square foot ( ft²) = 0.09290304 square metres (m²)
square inch (in²) = 0.00064516 square metres (m²)

### Area and Perimeter of Various Shapes

### Changing the shape of an Area

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