circumference (c) of a circle directly proportional to its radius (r) this statement is written as
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Hey mate
Step-by-step explanation:
2pirh proportional to r
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the answer is immediately seen to be CB / CA = 4/2 = 2 or CB = 2 CA. That is, the circumference of a circle is proportional to its radius, R; double R and you double C. The factor '2 pi' is simply the constant of proportionality between C and R.
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