Question

A circle has an area of 153.86 square feet. What is the circumference, in feet, of the circle?

Answer 1

43.97 is the circumference

Answer 2

Answer: 80.32

Step-by-step explanation:

so the equation for area is pi*r2 you can work it backwards given only the area. so to start you must dived the area by pi (153.86/3.14). then you get 163.65. then you must find the square root of that. you get 12.79.

now you have the radii (12.79). the equation for circumfrence

is r*2*pi or d(diamiter)*pi. given that we multiply 12.79 by 2. we get 25.58 the diamiter. then multiply that by pi (25.58*3.14). and here is your awnser 80.32

hope i did it right.