the diameter is the radius of a circle times 2. you just double the radius.
If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi
The diameter of a circle is twice its radius, or 2r.
The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
The diameter of a circle is twice its radius.
Formula: diameter = pi / circumference
pi*diameter = circumference Rearrange the formula so as the diameter is the subject of the formula: diameter = circumference/pi diameter = 7/pi = 2.228169203
Depends on what information you do have.
PI times the DIAMETER
the formula to calculate the circumference of a circle is the diameter of the circle x 3.14 or "pie"
The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.
The formula for the circumference of a circle is pi * diameter or (2 radius.)
diameter = circumference / pi diameter = radius * 2