Question

Find the circumference of the circle.
Formula: C = π d

Use 3.14 for pi.

Answer 1

C= 56.52

Explanation:

`C=\pi d\\`

`C=(3.14)(18)\\C=56.52`

If you didn't understand it in mathmatical terms, then here it is in English.

Step 1:

Re-write the formula (Please don't forget to do this step as it is a VERY important step in math)

Step 2:

Once yoou have re-writen the formula, substitute

In place of
`\pi` write "3.14"

In place of
`d` write 18. I got 18 because the diameter is 2r or twice the amount of the radius. So I added 9. So the equation would be
`C=(3.14)*(9+9)`

`C=(3.14)*(18)`

Step 3:

Solve for "C" or Circumfrence

`C=(3.14)*(18)\\C=56.52`

I hope it's clear and understandable. :D

Answer 2

Answer: I believe the answer is around/about 56.55

Step-by-step explanation: C=2πr=2·π·9≈ 56.54 or aound 56.52

Formula: C=2πr

Simplified Equation:

2 x 3.14 x 9= 56.52 - 56.55

Good luck!! I hope this helps! All you have to do is memorize the formula, break down & simplify the numbers and equation and you're golden!!

Edit: I reccomend checking out Khan Academy for math help!