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.

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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.

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The formula for calculating the total surface area of a pyramid is: S = (1/2)Pl + B. The surface area of a pyramid is the total sum of the lateral area combined with the area of the base.

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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.

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