Pi= 3.1416
circle / 3.1416=diameter
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The radius of the circle is: 9.549 cm
The Answer is 20cm because you divide the diameter by 2 and then it should be your answer EX: 20/2=10, 102= Radius
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
The diameter of a circle is double the radius. So a circle with a radius of 7 cm has a diameter of 14 cm.
The circumference of a circle with an 8 cm radius is: 50.27 cm