Question

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Answer 1

Area of full circle:
A = πr²
A = π(9)²
A = 81π
A = 254.4690049

Answer 2

But its not a full circle - its only 240deg....so...

Answer 3

yeah.. subtract it?

Answer 4

Or.. idk T.T

Answer 5

How many deg. are there in a full circle?

Answer 6

360

Answer 7

@superdavesuper
Angle aob measures 120 deg?

Answer 8

so what do u think? :)

Answer 9

i'm thinking 240 is the answer.. but how.. im not sure

Answer 10

@liliegirl yes...according to the drawing.

Answer 11

No, the shaded area is a PORTION of a full circle...u already calculated the area for a full circule...so what portion is shaded?

Answer 12

@superdavesuper

Area of the sector is 27pi so subtract it from the area of the full circle....

Am I correct?

Answer 13

No need to substract...just a simple ratio and proportion @liliegirl

Answer 14

@superdavesuper
The area is 54pi??
Just a guess..... :)))

Answer 15

the area of full circle minus the unshaded part?

Answer 16

Any formula or something?

Answer 17

Full circule - 360 deg. shaded - 270 deg.

Answer 18

270 or 240? so complicated

Answer 19

Shaded is 240..

Answer 20

the answer is not 345.53?

Answer 21

My answer is 169.65

Answer 22

Sorry I miss typed. Shaded is 240 n @liliegirl has the right answer of 54 pi :)

Answer 23

I see.
@liliegirl how did you get it? :)

Answer 24

You have to get the area of the unshaded part.. that is a sector...
Area of the sector is
\[\pi(9^{2})(180)\div360\] which is 27pi...

Then subtract from the area of the full circle (81pi)

You'll come up with 54pi.

:))

Answer 25

should be 120deg....or u can simply multiply the total area by 270/360. either way will work out the same.

Answer 26

Sorry.. typo error.. haha it should be 120...

Answer 27

thank you so much! :)