alleryWhich formula relates the circumference c and diameter d of a circle?
Api = d / c
Bpi = c × d
Cpi = c / d
Dc = pi / d
Answer & Solution
Correct answer: C. pi = c / d
1. Pi is the ratio of circumference to diameter.
2. So pi = c / d.
3. Reversing the fraction or multiplying gives wrong relations.
_Source: Wikipedia, Elementary algebra, Variables_
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