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.
Calculating the radius of a semicircle depends on what information about the semicircle is given.
In a semicircle, the diameter is the straight line. It is also equal to double the radius, and that property allows it to be used when calculating area and circumference.
Radius is = to half the diameter so.... when the radius of the semicircle is 5ft then the diameter is 10ft.
a semicircle is half of a circle... so like a circle cut in half, in a straight line. just for some information you may also need in the future: area of a semicircle: multiply the radius by itself and then multiply that by pi (approx. 3.14). divide that by 2. perimeter (circumference) of a semicircle: pi times radius. hope that helps.
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.
Area of a semicircle = (pi*radius^2)/2
50.25cm
That would depend on the radius which has not been given but the area of the semi circle will be (pi*radius squared)/2
Calculating the radius of a semicircle depends on what information about the semicircle is given.
Pi*radius squared is how to find the area of a semicircle
The diameter of the semicircle will be twice the radius.
Area in square inches = (pi*radius^2)/2
2pi sq cm
In a semicircle, the diameter is the straight line. It is also equal to double the radius, and that property allows it to be used when calculating area and circumference.
You can multiply the radius by pi to get the length of the semicircle.
An area of a circle is pi*r2 - so an area of a semicircle is 0.5*pi*r2: 0.5*3.14*42 = 25.13 square meters