## anonymous one year ago help!

1. anonymous

At a school carnival, the diameter of the mat of a trampoline is 10 feet and the diameter of its metal frame is 12 feet. What is the length, in feet, of the metal frame that surrounds the trampoline? Use 3.14 for π and round your answer to the nearest tenth. 15.7 feet 18.9 feet 31.4 feet 37.7 feet

2. anonymous

@ganeshie8 @jtvatsim

3. Jhannybean

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4. anonymous

okay so i think its asking for the circumference of the metal frame do you know the formula for the circumference ?

5. Jhannybean

If you're trying to find the length of the metal frame that surrounds the trampoline, that's simply finding the circumference. circumference = length So what is the circumference of the circle?

6. Jhannybean

Sorry, what is the formula for circumference?*

7. jtvatsim

@geny55 Are you more familiar with this formula $C = \pi d$ or this formula for the circumference? $C = 2\pi r$ Mathematically, they are the same, but some people feel more comfortable with one over the other.

8. anonymous

do you understand that @geny55 ?

9. anonymous

@jtvatsim

10. anonymous