Question

Arc AB of circle O contains 72 degrees and is 6 pi long. Find area of circle O.

Answer 1

first find the radius from the length of the Arc

Answer 2

What's the relationship between an arc and radius?

Answer 3

@PaxPolaris ?

Answer 4

length of arc \[=\frac \theta{360}\times 2\pi r\]

Answer 5

if \(\theta\) is in degrees

Answer 6

r= 15

Answer 7

Is the answer 225 pi?

Answer 8

yes :)

Answer 9

tysm~