it is half the diameter e.g 10cm diameter = 5 cm radius
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The radius of a circle is half of its diameter.
the radius of a circle is half of its diameter.
It's 18 cm. The radius is half the diameter of a circle. Half 36 cm is 18 cm.
Radius = 1/2 of diameter = 4 cm
The radius is always exactly half of the diameter, so if the radius is 8 cm, then the diameter is 16 cm.