Q:

# What is the formula for the area of a semicircle?

A:

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.

Know More

## Keep Learning

Credit: Alpha CC-BY-2.0

A semicircle is half a circle. The diameter of the circle divides the circle into two equal semicircles. The formula for a semicircle is derived from the formula of the circle, only divided by two. An alternative method is to use the diameter, which is twice the length of the radius. Therefore, using the diameter of the circle, the formula for finding the area of one semicircle is (?*D*D)/4, where D is the diameter and is equal to 2R.

Sources:

## Related Questions

• A:

The formula for the area of a circle is pi multiplied by the radius of the circle squared. The radius of the circle is the length of a straight line stretching from the center of the circle to the line of circumference. It is equal to half the diameter.

Filed Under:
• A:

The formula for the area of a triangle is A = 1/2 x b x h. The value b is the width of the base and h is the height of the triangle from that base.

Filed Under:
• A:

The formula for the area of a parallelogram is base times height. A parallelogram is a four-sided figure in which the opposite sides are parallel to one another and have the same length and the sum of all internal angles is 360 degrees.