The perimeter of a semicircle is 1/2 of the circumference of the corresponding complete circle plus the diameter of the circle. The distance around the outside of a semicircle is generally called its perimeter.
To find the area of a semicircle, use the formula 1/2(pi x r^2). You need the value of "r," or radius of the circle, and pi.
The area of a semicircle is (?*R*R)/2. This means the radius of the semicircle is squared, multiplied by the constant pi, then divided by 2.
The circumference of a circle is calculated by multiplying pi by the diameter, or 2 pi times the radius. The diameter or radius value is required to calculate circumference.
To calculate the circumference of a circle, multiply the diameter of the circle in question by pi. You need to know the diameter of the circle to complete this task.
The circumference of Earth is 24,901.55 miles at the equator, located at zero degrees latitude and the point at which the planet is the widest. The circumference measures the distance around Earth. Measured around the poles, the circumference is slightly smaller at 24,8...
To measure a circle's circumference, find the circle's diameter, then multiply the diameter by pi to find the circumference. If you only have the radius, multiply it by two to find the circle's diameter.