Question

A circle with a diameter of 8 inches has a circumference of?

Answer 1

There's a formula for the Circumference of a Circle. Its 2 times Pi (3.14..) times the Radius

Answer 2

The Radius is equals to the diameter divided by 2.

Answer 3

so 2*3.14*4 = circumference?

Answer 4

Correct. Exactly that. Now if they ask you for an exact answer, leave Pi as Pi, then just multiply 2*4

Answer 5

it says answer as a multiple of pi or use 3.14

Answer 6

oh, well in that case you can use either. It would be \[8\pi \] or 25.12

Answer 7

ok thanks! how would i find the area?

Answer 8

There's a formula for that as well. It is (Pi) * r^2 (or r*r) where r is the radius. Or diameter divided by 2

Answer 9

\[\pi r^2\] to be exact

Answer 10

so 50.24 in.

Answer 11

yep, correct

Answer 12

thanks!

Answer 13

no problem