Which of the following is not equivalent to the formula for the circumference of a circle, C = 2r? Cr = 2

The first thing you should know in this case is that the circumference of a circle is given by:

C = 2 * pi * r

Where,

r: radius of the circle.

We have then that the following equation is not equivalent to the circumference of the circle:

Cr = 2

Answer:

The following is not equivalent to the formula for the circumference of a circle:

Cr = 2

C=2r because the circumference and the radius arent together its not measured together.