To find the area using the circumference or the distance around the circle use the formula area c24p where c is the circumference. In Excel p is represented in a formula with the PI function which returns the number 314159265358979 accurate to 15 digits. A p r2.
The area of a circle is found with the formula A 314r2 where 314 represents 314.
The area of a circle is the total area that is bounded by the circumference. The surface area of circle is 4pr 2. One method of deriving this formula which originated with Archimedes involves viewing the circle as the limit of a sequence of regular polygonsThe area of a regular polygon is half its. Area pi diameter2diameter2 Area 14 pi d 2.