Question

Suppose the diameter of a circle is 7. What is its circumference?

Answer 1

@haleyelizabeth2017

Answer 2

isn't circumference \[2 \pi r^2\]?

Answer 3

so if so.....then it is \(2 \pi (3.5)^2\)

Answer 4

then you do \((3.5)^2\) first which is 12.25 then multiply that by 2. which equals \(24.50 \pi\) or 77 (rounded up)

Answer 5

Circumference of a circle=
\[C=2 \pi r \text{ or use } C=\pi d\]
where r is radius
and d is diameter

Answer 6

oh....whoopsies I haven't used it in a while so I forgot :(