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
2 answers:
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:
.....[1]
where,
r is the radius of the circle.
We know that:
diameter(D) = 2r
Substitute in [1] we have;
Therefore, the equivalent formula for the circumference C=2πr is, C=πD
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