To find the diameter of a circle, you use pi to find the radius, because the middle of a circle is pi.
Diameter = circle's circumference/pi
Pi is the circumference of the circle divided by the diameter of the circle. Every circle, that ever was, is, or ever will be.
Circumference of a circle = 2*pi*radius or diameter*pi
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
the area of a circle is 2 X pi radius
Circle's circumference = 2*pi*radius or diameter*pi
Area of the circle = pi*radius2 = pi*52
Oh honey, it's simple math. The circumference of a circle is found by multiplying the diameter by pi (π). So, if you have the diameter in centimeters, just multiply it by 3.14159 to get the circumference in centimeters. Easy peasy lemon squeezy!
circumference of a circle = 2*pi*radius or pi*diameter
Most scientific calculators have a button for pi. So to find the circumference of a circle multiply pi by the diameter. If there is no pi button you can approximate pi as 3.14.
Multiply the diameter of the circle by (pi).