Diameter of circle = 2 * Radius of the circle.
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Length of a radius is always half the diameter of a circle. This means that the circle has a radius of 2cm.
Area= pi*r2If the diameter of the circle is 2cm, the A= pi cm2If the radius of the circle is 2cm, then: A=3.14159*4=12.567 cm2
The area of a circle with a diameter of two cm is about 3.1416 cm.
Since diameter is twice its radius, the radius of this circle would be 60
The radius (radii) of a circle is 1/2 of the diameter. The radius of a circle with a 6.2 cm diameter is 3.1 cm.