anonymous
  • anonymous
hi there, please help. thx <3 A circular picture is 8 inches in diameter. Part A What is the area of the picture in square inches? A. 4π square inches B. 8π square inches C. 16π square inches D. 32π square inches
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@ganeshie8
ChillOut
  • ChillOut
\[A_{circle}=\pi*r^{2}.\] where r is the radius. You were given the diameter, which is 2 times the lenght of the radius.
anonymous
  • anonymous
hes got it

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anonymous
  • anonymous
ok so i do 2x the length of the radius and then i'll get my answer, right? @ChillOut
ChillOut
  • ChillOut
You take half of the lenght of the diameter, which in this case is 8. The radius is 4.
anonymous
  • anonymous
wait so my answer is 4 or i multiply it by four? sry i'm confused :b
ChillOut
  • ChillOut
|dw:1437145622174:dw|
anonymous
  • anonymous
ok so would my answer be D.?
ChillOut
  • ChillOut
You plug 4 in the equation I presented you, I.E. \[A_{circle}=\pi*(8/2)^{2}= 64/4*\pi\]
anonymous
  • anonymous
ok so i did 60/4 and got 16
anonymous
  • anonymous
so now i multiply it x pie right?
anonymous
  • anonymous
hold on nvm :b i got confused
anonymous
  • anonymous
\[Acircle= \pi \frac{ (dia)^2 }{ 4 }\\A= \pi \frac{ 8^2 }{ 4} inch^2\\A= \pi \frac{ 64 }{ 4 } inch^2\\A=16\pi\ inch^2\\ \therefore\ option\ C\ is\ Correct.\]
ChillOut
  • ChillOut
Yes. Another way to write the equation is \(A_{circle}=\pi*(\frac{ d }{ 2 })^{2}\) where "d" is the diameter of the circle.
anonymous
  • anonymous
thank u guys! sry i went out :b

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