The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a. The formula to find the area of the segment is given below. The formula for the area of a circle is 2 x p x radius but the diameter of the circle is d 2 x r so another way to write it is 2 x p x diameter 2.
The formula for the area of a circle is 2 x p x radius but the diameter of the circle is d 2 x r so another way to write it is 2 x p x diameter 2.
Knowing the semicircle definition - half of a circle - we can easily write the semicircle area formula using the well-known circle area pr². POWER Radius2 will return the square of the Radius. Excel has this constant built in as a function with no parameter inputs PI. A C2 4p.