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
Circumference of a circle = 2*pi*radius or pi*diameter
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).