Question

The diameter of a circle is 15cm. What is the radius of the circle?

Answer 1

That is the diameter

Answer 2

That is the radius

Answer 3

The radius is known to be 1/2 the diameter:
\[D=2r\]\[\frac{D}{2}=r\]\[15=2r\]\[r=7.5cm\]

Answer 4

As you can see, you have to divide the diameter in half to get the radius.

Answer 5

if 15 is the diameter....
15 / 2 = 7.5 (radius)

Answer 6

Right, thank you all.