alleryA circular coin has a radius of 3 cm. What is its diameter?
A12 cm
B9 cm
C3 cm
D6 cm
Answer & Solution
Correct answer: D. 6 cm
1. A diameter is twice the radius, so d = 2r.
2. Diameter = 2 x 3.
3. So the diameter is 6 cm.
_Source: Wikipedia, Radius (CC BY-SA 4.0), Radius_
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