The radius of a circle is twice its diameter.
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The radius of a circle is half the diameter, so if the circle has a diameter of 2 cm, the radius would be 1 cm.
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.
The circumference of a circle if the if the radius is 6 cm is: 37.7 cm
The radius of a circle is half of its diameter. If the diameter of the circle is 150 cm, then the radius would be half of that, which is 75 cm. The radius is the distance from the center of the circle to any point on its circumference.
4 cm radius = Area of 50.26548 sq. cm.