Anikate
  • Anikate
fin area of shaded region, please help: http://prntscr.com/7q4orp
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Hi again!
Anikate
  • Anikate
hi :D
anonymous
  • anonymous
Since AO is equivalent to AB it is a isosocles triangle.

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anonymous
  • anonymous
SO from that we can calculate angle o and angle b are 40 degrees
anonymous
  • anonymous
do you know the sector formula?
anonymous
  • anonymous
\[\frac{ x }{ 360 } \times \pi r^2\]
Anikate
  • Anikate
sorry if i dont respond sometimes, my connection is terrible. My computer is as far as possible away from our network router, literally at the other corner of the house. and parents dont want to spend money on a dual band network router.
anonymous
  • anonymous
x would be 40, as we found angle O was 40. this means the shaded area is 40 degrees of the whole 360 degrees of the circle.
anonymous
  • anonymous
You get me?
anonymous
  • anonymous
so \[\frac{ 40 }{ 360 } \times \pi 6^2\]
anonymous
  • anonymous
then \[\frac{ 1 }{ 9 } \times 36 \]
anonymous
  • anonymous
sorry 36 pi
anonymous
  • anonymous
so then once you multiply 1/9 and 36, you get 4, which then would equal 4 pi
anonymous
  • anonymous
So your answer is B, \[4 \pi\]
Anikate
  • Anikate
ypu thanks! @whatdoesthismean

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