For a circle with a diameter of 20 mm, it's radius, which is half that, will be 10 mm. The area (A) of a circle is pi (about 3.1416) times the radius (r) squared (r2). Here's how we work it: Acircle = pi x r2 = 3.1416 x 102 = 3.1416 x 100 = 314.16 mm2
Chat with our AI personalities
The area of a circle with a diameter of two cm is about 3.1416 cm.
The area of a circle if the diameter was s 7ft is 38.48ft
Area of a circle = (1/4) x (pi) x (square of the diameter)
The area of a circle with a diameter of 10 centimeters is: 78.54 cm2
The diameter of a circle with an area of 86.54625 cm2 is: 10.49734 cm