Respuesta :
12. The radius is 12. You said it. If you meant the diameter is 12, then you divide by 2, and the radius is 6.
Step-by-step explanation:
The radius is half the diameter, so use the formula r = D/2. This is identical to the method used for calculating the radius of a circle from its diameter. If you have a sphere with a diameter of 16 cm, find the radius by dividing 16/2 to get 8 cm. If the diameter is 42, then the radius is 21.