Question

What is the circumference of a circle with a diameter of 9 inches? (use for pi)

27 in.
24in.
28in.
30 in.

(show work)


PLZ HELP MEH :-:

Answer 1

i think it would be 28.26

Explanation:

because C=2 pie r and D=2 r (solving for C=pie d =pie . 9 = 28.27433 then just round and thats how you get 28.27 (sorry if its confusing) (im not good at explaining but i am smart)

Answer 2

Circumference formula: 2πr

2 multiply the π by the radius which will be 4.5 because to get the radius u will have to to do 9 divide 2 which will be 4.5.

Calculate that in the calculator and you’ll get:

C=28.3 ( I rounded to the nearest tenth)