anonymous
  • anonymous
What is the area of the shaded region below?
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
I got 116.28 ^- ^
Luigi0210
  • Luigi0210
formula used?

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More answers

Jhannybean
  • Jhannybean
A = (N/360) * pi * r^2 N = 155 deg
Jhannybean
  • Jhannybean
*and r = 8
anonymous
  • anonymous
I see hold on let me work it out (:
Jhannybean
  • Jhannybean
A = (155/360) *pi* (8)^2 A = (31/72) * pi * 64 A = ?
anonymous
  • anonymous
86.57
anonymous
  • anonymous
That is precisely \(155/360=31/72\) of the circle. The area of the whole circle is \(\pi r^2=64\pi\text{ cm}\). The area of our sector is then just \(31/72\times64\pi=248\pi/9 \text{ cm}^2\)
anonymous
  • anonymous
which is \(\approx86.57\text{ cm}^2\)
anonymous
  • anonymous
Damm that was too easy.
anonymous
  • anonymous
But not easy for me. -__ -
nincompoop
  • nincompoop
did you know that the area of a circle is (pi)r^2?
anonymous
  • anonymous
Yes i did but there are different theroms in my head about circles that i mix them up a lot .
nincompoop
  • nincompoop
if you did then your area of a given circle with 8 cm radius gives you an approximately 200 and some odd cm^2 and half of that (180 degrees) should be around 100 cm^2. those two alone should give you the idea that your answer is wrong and must figure out what you were missing in the equation.
anonymous
  • anonymous
The answer wasn't wrong it was one of the choices (:
nincompoop
  • nincompoop
memorize it like your life depended on it. area = (pi) times the squared of radius 116 was wrong even though it was one of the choices
nincompoop
  • nincompoop
keep reciting it over and over and over until you don't mix them up it will make your life easier if you knew this like you knew how old you are
anonymous
  • anonymous
No not that answer the other one, aha 116 was not there
anonymous
  • anonymous
@nincompoop don't go to my next question it will just get you irritated. (:

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