Question

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

2 times pi over c equals r

c over quantity 2 times r equals pi

c over quantity r times pi equals 2

c over quantity 2 times pi equals r

Answer 1

2 times pi over c equals r
\[2*pi/C=r\] x

c over quantity 2 times r equals pi
\[C/2r = pi\]

c over quantity r times pi equals 2
\[C/r*pi = 2\]

c over quantity 2 times pi equals r
\[C/2*pi=r\]

first one is not equivalent.

Answer 2

thanks