r = 2.5 mm
r = 12 ft
d = 34 cm
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Why?
To find the radius with the diameter simply divide by two since the diameter is twice the radius.
To find the diameter with the radius simply multiply the diameter by two. This is because the diameter is twice the radius.
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey