The area is 12.566 units2
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circumference of a circle = 2*pi*radius area of a circle = pi*radius squared
Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or diameter*pi Diameter of a circle = 2*radius
A circle with a radius of 2 units has an area of 12.57 square units.
The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared