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Mathematics 16 Online
Nnesha (nnesha):

...help

Nnesha (nnesha):

OpenStudy (anonymous):

okay im back!

Nnesha (nnesha):

:)

OpenStudy (anonymous):

so... do you know the formula for finding the surface are of a triangular prism?

OpenStudy (anonymous):

there is one measurement missing

OpenStudy (anonymous):

so you have to figure out that measurement

OpenStudy (anonymous):

Actually, there is not. Find the area of the right triangle, divide by two, and multiply by two. then do the rectangles and add the amount of rectangles' areas up. add the total areas up and theres your surface area.

OpenStudy (anonymous):

that is one way to figure it out

OpenStudy (anonymous):

but why would we divide by two then multiply by two?

OpenStudy (anonymous):

that would get you the same number you originally started with

OpenStudy (anonymous):

because there's two right triangles on two sides. You divide by two to get the area.

OpenStudy (anonymous):

(one on each side)

OpenStudy (anonymous):

oh yes im sorry

OpenStudy (anonymous):

i am blanking today

OpenStudy (anonymous):

but you could always use the formula to figure it out

OpenStudy (anonymous):

Yes, that's what I'm saying, just without any formulas. All you need to know is how to get the area of a triangle and then the area of a rectangle.

Nnesha (nnesha):

i'm out of mind today need more explanation if you draw that would be awesome

OpenStudy (anonymous):

if you were to use the formula, it would be SA= wh+lw+lh+ls w=width h=height l=length s=side

OpenStudy (anonymous):

the side is what we are missing

OpenStudy (anonymous):

|dw:1407510353528:dw|

Nnesha (nnesha):

can we use a^2 + b^2 = c^2

OpenStudy (anonymous):

yayyy!!! correct!

OpenStudy (anonymous):

Well, if you wanted to find the hyponetuse, or the slant height, then you could use it.

OpenStudy (anonymous):

This is what we would get

OpenStudy (anonymous):

Oh, I'm sorry, you are correct. You need that measurement to find the area of the slanted rectangle. Please accept my apologies.

Nnesha (nnesha):

yes i also get that

OpenStudy (anonymous):

oh no need to apologize! i thought i was the one who made the mistake. your way would also work!

OpenStudy (anonymous):

\[c^2 = 5^2 + 12^2\]

OpenStudy (anonymous):

so @Nnesha, we now have|dw:1407510717906:dw|

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