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Mathematics 15 Online
OpenStudy (anonymous):

Find the lateral area for the prism.

OpenStudy (anonymous):

OpenStudy (anonymous):

@surjithayer

OpenStudy (jdoe0001):

I wonder which the base is, the rectangular or the triangular depending on which the base is, then we'd know which are the lateral sides

OpenStudy (anonymous):

I think I have half of the equation correct

OpenStudy (jdoe0001):

because if we skip the triangles, we really only have 3 rectangles as sides

OpenStudy (anonymous):

Oh, I see what you mean

OpenStudy (anonymous):

The end product is suppose to fit into an equation such as this: \[?+?\sqrt{3}\]

OpenStudy (jdoe0001):

one side is 6, one side is 4 both are sides in a right triangle, meaning the other side is NOT 6, but longer

OpenStudy (anonymous):

sorry, disregard the "3" I put in the equation

OpenStudy (anonymous):

wouldn't the base be 4 times the square root of 3?

OpenStudy (jdoe0001):

hmm well if all they want is the lateral area, you don't need the base

OpenStudy (jdoe0001):

and if the base is the triangle there at the bottom then is just adding 3 rectangles

OpenStudy (anonymous):

Oh, sorry. I was thinking of total area

OpenStudy (anonymous):

LA= ph

OpenStudy (jdoe0001):

so looking at the triangle, it has a side of 4 and a side of 6, is a right triangle so a = 4, b = 6 \(\bf c^2 = a^2 + b^2 \implies c = \sqrt{a^2 + b^2} \implies c = \sqrt{4^2 + 6^2} \)

OpenStudy (jdoe0001):

\(\bf c = 4\sqrt{13}\) so you have 1 rectangle of 4 x 8 and one of 8 x 6 and another rectangle of \(\ 8 \times 4\sqrt{13}\)

OpenStudy (jdoe0001):

hmmm shoot

OpenStudy (jdoe0001):

\(\bf c = 2\sqrt{13}\) so you have 1 rectangle of 4 x 8 and one of 8 x 6 and another rectangle of \( \ 8 \times 2\sqrt{13}\)

OpenStudy (jdoe0001):

hmm, something is not ... working well

OpenStudy (jdoe0001):

ok, yes, I thought I had a typo,

OpenStudy (anonymous):

I still don't understand how to calculate the LA by using the measurements of each of those though

OpenStudy (anonymous):

do I calculate the perimeter of each individual one, add them, then multiply by 8??

OpenStudy (jdoe0001):

well, the rectangles are the SIDES, or LATERALS, you get their Area, add them up, and that's the lateral area

OpenStudy (anonymous):

ok, thank you! so I just need to calculate the area of the rectangles?:)

OpenStudy (jdoe0001):

yes

OpenStudy (anonymous):

alrighty! thank you!

OpenStudy (jdoe0001):

yw

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