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.

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 180¬ļ arc.

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

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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