What is the formula of circumference of a circle?

Answer as guest — Start Free Practice Test to earn Practice PointsHow to earn pointsAsk a question+3Answer a question+1Someone answers yours+1Your Q gets upvoted+1Pioneer bonus (first 5)+5, ask questions & climb the leaderboard!

A 4×side
B 2πr
C Length×breadth
D None of the above

Show answer and explanation

Answer: B. 2πr

The circumference (distance around) of a circle is 2 x pi x r, where r is the radius. It can also be written as pi x d, since the diameter d = 2r.

Answering after opening this box earns no Practice Points.

15 answered 93% got it right

Rules for asking and answering

What is the formula of circumference of a circle?

More questions like this