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yan [13]
3 years ago
11

If r is the radius of a circle and d is its diameter, which of the following is an equivalent formula for the circumference C=2π

r?
A. C=2πd
B. C=πD
C. C=πr2
D. C=πdr
Mathematics
2 answers:
zaharov [31]3 years ago
6 0

Answer:

Option B is correct

C=πD

Step-by-step explanation:

As per the statement:

If r is the radius of a circle and D is its diameter.

Given the circumference of the circle:

C = 2 \pi r             .....[1]

where,

r is the radius of the circle.

We know that:

diameter(D) = 2r

Substitute in [1] we have;

C = \pi (2r) = \pi D

Therefore, the equivalent formula for the circumference C=2πr is, C=πD

Ahat [919]3 years ago
5 0
The answer is B.<span> C=πD </span>
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