Question

using the formula C=2πr, find the circumference of a circle with a diameter of 28 inches.

Answer 1

Given the diameter is 28, can you find the radius?

Remember diameter= 2 x radius

Answer 2

Yes, that is what I remember :)

Answer 3

Ok. So what would be the radius of this circle?

Answer 4

Just do not know how to set up. Confused:(

Answer 5

would I set it up something like this: Diameter = (2)(3.14) which becomes -> 28=(2)(3.14)?
Am I on the right track? :)

Answer 6

No. All I asked was for the radius. Haha.
So
Diameter=2xradius.
And you know diameter=28
So
28=2 x radius
Divide both sides by 2
So
Radius=14

Answer 7

Now plug into your circumference formula

C= 2(3.14)14

Answer 8

And I'm not sure if you could use it
But another version of the formula is
C= pi x diameter
This would be easier since you were already given the diameter

So
C=(3.14)28
But you will still get the same answer

Answer 9

Oh, Thanks. Would never had thought of that! Haha! not good with circles, circumference, etc. Thank you so much ;)

Answer 10

No problem.
This is just about plugging numbers into formulas. Nothing much

Answer 11

Everybody the answer is (88)

Oh okay. pi= 3.14 x 2 = 6.28. 6.28 x 14 = 87. 92. ANSWER 88 :D right. Round to the nearest 10 which is 88 :)