Area Index

Area of a Semicircle Formulas & Calculator

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

Semicircle Area and Perimeter

Formula Knowing the radius

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

Semicircle Area

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

Radius Length

Area result

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Where:

$$pi = "constant number"$$
$$r = "semicircle radius"$$

Semicircle Definition

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

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

Semicircle

Area Definition

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.

Formula Definition

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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