Thread: need help with a math formula

i have a problem, Sally's art project is in the shape of a circle. She wants to put a piece of glitter string around the adge of her project. if her project has a radius of 4 inches, how much string will she need?

I have done it twicw and gotten 2 different answers one 16 than 8 just need for some one to show how thanks

Please tell us exactly what you did and how you got those two answers. You appear to be saying that the string is going around the circumference of the circle. Is that correct? Do you know a formula for the circumference of a circle?

(If the string is on the circumference of the circle, neither 16 nor 8 is even close to the correct answer.)

Length of string required is same as perimeter of circle
= 2πr
= 2 × 3.14 × 4 = 25.12 inch
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