anonymous
  • anonymous
it gives me a right triangle prism, i guess, the height is 6.4 the base is 2 and the line at the top of the hypotenuse is 2.9. find the surface area
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
I'm going to send a pic. Tell me if this is what you have.
anonymous
  • anonymous
ok
anonymous
  • anonymous

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anonymous
  • anonymous
6.4, not 6...sorry
anonymous
  • anonymous
how do you draw something
anonymous
  • anonymous
I just go into 'paint' in windows, then save it on the desktop, then click 'attach file' below, attach and post.
anonymous
  • anonymous
If it's what I think it is, it isn't 'hard', just finicky.
anonymous
  • anonymous
It comes down to the same principle we used to solve the last problem. You have faces that are shapes you already know the area of. You just break the surface area down into those shapes. Are you drawing something?
anonymous
  • anonymous
yes
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
nothing shows up
anonymous
  • anonymous
Ah, okay, yes, something did come through - I just had to magnify your atom of a picture, lol!
anonymous
  • anonymous
how do u magnify and it was pretty big when i made it
anonymous
  • anonymous
I'm thinking the hardest part for you is the triangular face?
anonymous
  • anonymous
I use Google Chrome, and it opens in a new page with a little magnifying icon.
anonymous
  • anonymous
Let's do the triangle faces first.
anonymous
  • anonymous
where is it at when u clicked it in the center
anonymous
  • anonymous
and ok
anonymous
  • anonymous
You have two right-angled triangles. These have a height of 6.4 and base 2. The area of any triangle is \[\frac{1}{2}(base)(perpendicular.height)\]Luckily, perpendicular height is the height of a right-angled triangle. So your area is\[\frac{1}{2} \times 2 \times 6.4=6.4\]You have two of these, one on the top, one on the bottom.
anonymous
  • anonymous
So the area of the triangular faces is 2 x 6.4 = 12.8. Put this aside and tackle the faces on the side.
anonymous
  • anonymous
These are just rectangles. Each has dimensions 6.4 x 2.9 = 18.56. Again, you have two of these, so your area for the side-on rectangular faces is 2 x 18.56 = 37.12.
anonymous
  • anonymous
Now all you gave left is the base. It is rectangular and has dimensions, 2 x 2.9 = 5.8. Can you see how the side length of the base is the same as the length of the prism at the top (where you've written 2.9)?
anonymous
  • anonymous
yea
anonymous
  • anonymous
then just add them all up?
anonymous
  • anonymous
The total area is just the sum of these separate areas:\[12.8 + 18.56+5.8=37.16\]square units.
anonymous
  • anonymous
You got it.
anonymous
  • anonymous
youre freakin smart man
anonymous
  • anonymous
You picked it up, so you're doing alright too ;)

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