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=πr^2
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, among the provided options, the closest one is:

C = 2r (though it is missing the π).

Make sure to use the full formula: C = 2πr.