Question

Evaluate C= 2 A r, for r= 8.
C=10,
C = 16
C= 28.7
C= 16​

Answer 1

Correct choice is
`C=16 \pi`.

Explanation:

Given equation is
`C=2 \pi r`.

Now we need to find the value of C using given equation
`C=2 \pi r` and
`r=8`.

To find that, we just need to plug
`r=8` into
`C=2 \pi r` and simplify.

`C=2 \pi r`

`C=2 \pi * 8`

`C=16 \pi`

Hence correct choice is
`C=16 \pi`.

Answer 2

Answer: Second Option

`C = 16\pi`

Explanation:

We are evaluating aarco lengths

The formula for the arc length is:

`C = 2\pi r`

We want to know what is the arc length for a radius of r = 8

Then we substitute r = 8 in the equation and solve

`C = 2 \pi * 8`

`C = 16\pi`

The correct answer is the second option