Answer:
r =45.5 units
Step-by-step explanation:
The diameter is twice the radius, or the radius is 1/2 the diameter
r = d/2
r = 91/2
r =45.5 units
Answer: 45.5
Step-by-step explanation: 91/2 because to find the diameter you have to multiply the radius by 2 and now we need to reverse it
