Which formula is used to find the circumference of a circle when the radius is given?(1 point)

Question

Responses

C=π2d
upper C equals 2 d

C=π2r
upper C equals 2 r

C=πr2
upper C equals r squared

C=πr

Answer 1

The correct formula to find the circumference of a circle when the radius is given is:

C = 2πr

However, none of the options you provided are exactly this. Based on what is closest, it seems like the response with "C=2r" might be intended to represent part of the correct formula. The correct response should include the π (pi) term and should look like this:

C = 2πr

If it's not listed as an option, please verify the choices for accuracy!