The Answer is 20cm because you divide the diameter by 2 and then it should be your answer
EX:
20/2=10, 102= Radius
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If the diameter of a circle is 20 cm, the radius would be half of that measurement, which is 10 cm. The radius of a circle is always half the length of the diameter. This relationship is defined by the formula: radius = diameter / 2.
This cannot be properly answered because a 20 cm radius equates to a 40 cm diameter. Also, a 50 cm diameter means a 25 cm radius.
Radius: square root of (12320/20*pi) = 14.00281721 cm Diameter: 28.00563442 cm
The diameter of a circle is twice its radius. Thus the radius of a circle is half its diameter. → a circle with a diameter of 15 cm has a radius of 15/2 cm = 7.5 cm
Diameter = Radius * 2 In this case, radius = 8 cm so diameter = 16 cm
The diameter of a circle is double the radius. So a circle with a radius of 7 cm has a diameter of 14 cm.