anonymous
  • anonymous
/Users/doreltibi/Desktop/Screen Shot 2012-12-31 at 1.17.06 PM.png
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
anonymous
  • anonymous
help
anonymous
  • anonymous
help

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anonymous
  • anonymous
|dw:1356989474509:dw| Does knowing that you can divide a parallellogram into a rectangle and two triangles help?
anonymous
  • anonymous
not really
anonymous
  • anonymous
|dw:1356989718574:dw| |dw:1356989750298:dw|
anonymous
  • anonymous
I think its like this: 144+b^2=400 b^2=266 b=16.3
anonymous
  • anonymous
yep, that's the height of the rectangle, and you just need to find the length and multiply.
anonymous
  • anonymous
how do u find the length
anonymous
  • anonymous
?
anonymous
  • anonymous
help
anonymous
  • anonymous
well, think about it. If you cut that triangle off and put it back on, just on the other side, you're not changing the length at all
anonymous
  • anonymous
so its twelve inches the length
anonymous
  • anonymous
no, that's the length of the triangle you cut off. The length of the base of the parallelogram is the length.
anonymous
  • anonymous
so the length is 20
anonymous
  • anonymous
|dw:1356990749844:dw||dw:1356990808666:dw|
anonymous
  • anonymous
see how that works?
anonymous
  • anonymous
Im realy confused inorder to find the area i just have to multiply 20 and 16 and get 320
anonymous
  • anonymous
area of a parallelogram is base times height. You correctly found the height, using the pythagorean theorem. Now, you need to figure out which one the base is. (It's the one perpendicular to the height, and it's not 20). I was giving you a picture so you could see why this particular formula works.
anonymous
  • anonymous
is it 32
anonymous
  • anonymous
@aacehm im i right
anonymous
  • anonymous
yes, it's 32. I hope you understood how that worked.
anonymous
  • anonymous
so the area would be 16*32
anonymous
  • anonymous
yea?

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