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If only the diameter is known, what must be done for the area formula?
ASquare it
BCube it
CHalve it
DDouble it
Answer & Solution
Correct answer: C. Halve it
1. The area formula needs the radius.
2. The radius is half the diameter.
3. So the diameter is cut in half.
_Source: OpenStax, Contemporary Mathematics, Ch 10 'Geometry'_
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