The radius is half the diameter ie 6.5*10-13
The diameter of any circle is twice its radius. A circle with a radius of 13 inches will have 2 x 13 = 26 inches for a diameter.
The diameter of a circle is always twice the length of the radius. Therefore, if the radius is 13 centimeters, the diameter would be 2 x 13 = 26 centimeters.
diameter = 2 x radius
If you know the radius, then Diameter = 2 x (radius) Circumference = (pi) x (diameter) or Circumference = 2 x (pi) x (radius)
2 x 13 x pi = 81.68 Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 2*pi*13 = 81.68140899
the radius is one-half the diameter radius = diameter/2 diameter = 2 x radius
diameter = radius x 2 = 7.4 x 2 = 14.8
Assuming you know the radius or diameter...(Pi) x (radius) x (radius) or (1/4 Pi) x (diameter) x (diameter) will give you the area.
Circumference is equal to pi x diameter Diameter is equal to 2 times the radius Circumference would be 2 x pi x radius
Circumference = (pi) x (diameter) Diameter = 2 x radius
No. The area of a circle is 3.142 x radius x radius (radius is half the diameter).
The radius X 2 = diameter.