Area of Semicircle

vCalc Reviewed

A = \frac{π \cdot r^{2}}{2}

$A = (pi * r^2 ) / 2$

(r) Radius of Circle

$(r)"Radius of Circle"$

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The Area of a Semicircle calculator computes the area of a semicircle based on the radius. /attachments/acf3eb11-3ed7-11e9-8682-bc764e2038f2/Areaofsemicirclewithdiameter-illustration.png

INSTRUCTIONS: Choose units and enter the following:

(r) This is the radius of the circle.

Area of Semicircle (A): The calculator returns the area in square meters. However this can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The formula for the area of a semi-circle is:

A = ½•π•r²

where:

A = area of semicircle
r = radius of circle