Area Index
# Area of a Semicircle Formulas & Calculator

## Formula Knowing the radius

### Where:

## Semicircle Definition

## Area Definition

## Formula Definition

The area of a semicircle can be calculated using the following formula: if you know the length of the radius.

If you know the length of the radius, you can calculate its area using the following formula:

$$"area" = (pi * r^2) / 2 $$

$$pi = "constant number"$$

$$r = "semicircle radius"$$

A semicircle is a shape or figure that is represented for half circle. It has 180Âº arc.

The semicircle is a very basic geometric shape and a very common appearance in nature.

It is the space of the internal surface in a figure, it is limited for the perimeter. Also, the area can be calculated in a plane of two dimensions.

It is a representation of a rule or a general principle using letters. *( Algebra, A. Baldor)*

When describing formulas in plural, it is also valid to say "formulae".

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