So the formula for the area of a semicircle is. Area semicircle Area circle 2 prĀ² 2 The area of a semicircle is just a half of the area of a full circle. If you know the radius of the circle and the height of the segment you can find the segment area from the formula below.
The area formula is.
The formula for the area of a circle is p x radius2 but the diameter of the circle is d 2 x r 2 so another way to write it is p x diameter 22. The formula the calculator uses is as follows. The formula for a semicircle is derived from the formula of the circle only divided by two. Once you have the radius you can use the Area of a Circle formula.