Question

what is the formula that relates circumference and radius?

a. (c + 2 = 2pi r)
b. (c = 2pi dr)
c. (c = 2pi r)
d. (c = 2pi / r)

Explanation:

Identify the variables

Using the Circumference Formula knowledge point

$$
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$$

State the standard relationship

Using the Circumference Formula knowledge point

$$ C = 2\pi r $$

Answer:

• A. \(C + 2 = 2\pi r\)
• B. \(C = 2\pi Dr\)
• C. \(C = 2\pi r\) (Correct answer)
• D. \(C = 2\pi/r\)