00:01
One problem per submission.
00:03
So i'm going to do what i feel like is maybe a harder problem.
00:10
So all of these are surface area.
00:12
So to find the surface area of this triangular prism, you would do, you would use the formula, length times with, plus length times with, plus length times with, because there are three rectangles going around.
00:34
Then there's two triangles, one on the front, one in the back, and you're going to use the formula base times height divided by two.
00:41
And so then i would do 44 times 24 is one rectangle, plus 44 times 20 is another rectangle, plus actually there's two of those 44 by 20, because if you're this is 20, then this is going to be 20.
01:06
So let me just erase this.
01:08
Redo my formula.
01:15
So that's two length width.
01:18
And then two times 20 times 44 plus two times base of the triangle, which is 24 times 16 divided by two.
01:31
Okay.
01:33
So that's one of them.
01:36
That's the formula.
01:40
So i'll finish solving for this.
01:43
Then i would do 44 times 24 is 1 ,056 plus 2 times 20 times 44 is 1 ,760 plus 24 times 16 divided by 2 times 2 times 2 is 384.
02:09
Then i'm going to add all these together 1056 plus 1760 plus 384 and that's 3 ,200 and that's square inches.
02:23
To get the surface area of this, you have to use the formula a plus b divided by two times the height.
02:30
Plus there's four different size rectangles.
02:36
So you would have to do length times width plus length times with plus length times with plus length times with.
02:41
There's a rectangle that's a 6 .7 by 26.
02:45
Okay.
02:47
Then there's one that's a 12 by 26.
02:50
And then there's one that's an 8 by 26 and one that's an 18 by 26...