Q:

What is the formula for the area of a semicircle?

A:

Quick Answer

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.

Continue Reading
What is the formula for the area of a semicircle?
Credit: Alpha CC-BY-2.0

Full Answer

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.

Learn more about Shapes
Sources:

Related Questions

  • Q:

    How do you find volume?

    A:

    The volume of a box with height "a" and basal area "B" is given by the formula V = a*B, and the volume of a spherical solid of radius "r" is given by the formula V = 4/3*pi*r^3. Volume measures the amount of space occupied by a solid figure.

    Full Answer >
    Filed Under:
  • Q:

    How do you find the volume of a cylinder?

    A:

    The formula for the volume of a cylinder is derived from the area of a circle. By finding the area of the base of the cylinder, you can multiply it by the height of the shape to find the volume.

    Full Answer >
    Filed Under:
  • Q:

    How do you calculate the area and perimeter of shapes?

    A:

    Calculating the area of polygons requires specific formula, while calculating perimeters simply involves the addition of all sides of a polygon. Calculating the perimeter or area of circles and other monogons involve formulas that use the mathematical concepts of pi and radius to reach a result.

    Full Answer >
    Filed Under:
  • Q:

    What is the formula for finding the volume of a cylinder?

    A:

    The formula for finding a cylinder is to multiply its base (B) and height (h) together, where the area of the base is given as pi multiplied by the radius squared. A cylinder is a solid geometric object composed of two circular ends and a curved side.

    Full Answer >
    Filed Under:

Explore