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22 votes
What is the circumference of a circle with radius 1 ?

User Uuu Uuu
by
8.3k points

2 Answers

3 votes

Answer: 6.28

Step-by-step explanation: Using the formula 2×pie×radius

Circumference=2×3.14×1

=6.28

User Maryisdead
by
8.0k points
10 votes

Answer:

Explanation:

C = circumference

r = radius

d = diameter

C = 2
\pir or C =
\pid

I will be using the second formula since it is what I prefer but please note that when using the first the only thing being multiplied by two is the radius, not pi.

d = 2r

d = 2 * 1

d = 2

C = 2
\pi

User Lucasjackson
by
7.5k points

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