Respuesta :

Answer:

Around 5.73. The exact answer is 18/pi. Why? The diameter is twice the radius (2r) The formula of the circumference if 2 pi R

if we divide 18, the circumference by pi, we get the diameter.

Step-by-step explanation:

c62712

Answer:

18/π

Step-by-step explanation:

Since 2 × π × r is the circumference of the circle,

2πr = 18

πr = 9

r = 9/π

Since the diameter is 2x the radius,

2r = d

2 × 9/π = d

18/π = d

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