anonymous
  • anonymous
Find the surface area of each of the following right prisms. Round to the nearest whole number. (There's a picture when you click on the question)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
ganeshie8
  • ganeshie8
You need to find the area of each of its faces and add them up
anonymous
  • anonymous
Thanks

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More answers

ganeshie8
  • ganeshie8
How many rectangles and triangles do you see here ?|dw:1435555721742:dw|
anonymous
  • anonymous
5 rectangles and 2 triangles
ganeshie8
  • ganeshie8
are you really sure about 5 rectangles i do see 2 triangles
anonymous
  • anonymous
I'm sorry i mean't 3 not five
ganeshie8
  • ganeshie8
great! find the area of each of them, remember how to find area of rectangle ?
anonymous
  • anonymous
No, what formula should I use to find the rectangle?
ganeshie8
  • ganeshie8
simply multiply the length and width : Area of rectangle = length x width
anonymous
  • anonymous
aww yes sorry. I'm just really tired right now.
ganeshie8
  • ganeshie8
|dw:1435556006598:dw|
ganeshie8
  • ganeshie8
similarly see if you can find the area of other two rectangles
anonymous
  • anonymous
Wouldn't it still be 5x12=60?
ganeshie8
  • ganeshie8
yes, what about the bottom rectangle ?
anonymous
  • anonymous
6x12=72
ganeshie8
  • ganeshie8
Excellent! so area of the 3 rectangular faces = 60+60+72 = ?
anonymous
  • anonymous
192
ganeshie8
  • ganeshie8
good, keep it aside. lets find the area of two triangles
ganeshie8
  • ganeshie8
|dw:1435556339793:dw|
ganeshie8
  • ganeshie8
the back triangle also looks exactly same, so the area of two triangles would be simply : 12 + 12 = 24
ganeshie8
  • ganeshie8
Add that to the area of rectangles and you're done!
anonymous
  • anonymous
192+24=216
ganeshie8
  • ganeshie8
Perfect! im pretty sure you can work the next problem on ur own
anonymous
  • anonymous
Yep thanks for all the help I needed it!!
ganeshie8
  • ganeshie8
just be careful, the shape looks a bit complicated... but you know what to do, simply find the area of each face and add up :)
anonymous
  • anonymous
Ok thank you soo much :) Have a nice night

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