Question

how to find the shaded area?

Answer 1

Okay, so im reviewing an old quiz and this is one of the problems on it that i got right but idk how i got it right

Answer 2

i know you have to find the sector area first

Answer 3

if that is a 90 deg angle, you can find the area of the sector = 1/4 of the entire circle
you can also find the area of the triangle
area of the shaded region is sector - triangle

Answer 4

90/360*10^2

Answer 5

right?

Answer 6

times pi

area of a circle = pi * r^2

Answer 7

ohh okay

Answer 8

i got it now thanks

Answer 9

the answer is 28.5

Answer 10

\[\large s=\left(\frac{n}{360}\right) \cdot \pi r^2\]

Answer 11

okay!

Answer 12

And n is the angle measurement

Answer 13

Thanks guys!