WILL GIVE MEDAL AND FAN

Find the surface area of the triangular prism.

Question

WILL GIVE MEDAL AND FAN




Find the surface area of the triangular prism.

natalie1234 · Answer

One sec

anonymous · Answer

ok i will try and help

natalie1234 · Answer

attachment

natalie1234 · Answer

well ive said that plenty of times and they havent told me anything so far. but thanks if i get banned for saying that is stupid because im only saying that to get people to help me which is what this website is for

anonymous · Answer

12*8*18 the way i got that is i add the equal sides, and d a m n just help the girl and quit bicering

anonymous · Answer

sorry i lost track

natalie1234 · Answer

these are my answer choices 

      72 cm2
       84 cm2
       96 cm2
       114 cm2

anonymous · Answer

well ok im way off course then lol let me recheack my work

e.mccormick · Answer

Find the areas of each side, including both ends, and add them.

natalie1234 · Answer

is it 72?

e.mccormick · Answer

72 is just the sides or lateral surface area.  Do not forget the ends.

e.mccormick · Answer

The mark saying it is a right triangle helps here.  It lets you know what the height is.  =)

natalie1234 · Answer

so its 96??

e.mccormick · Answer

Ummm...  OH, I see the small mistake you made there.  Remember, a triangle is half the base times the height.  =)  You just did base times height and took two of them.

anonymous · Answer

hey @e.mccormick someone needs help could you help if i tag you

natalie1234 · Answer

ok wait im a little confused. can you tell me the steps to slove this please(:

anonymous · Answer

but when you are done?

e.mccormick · Answer

Well, the rectangular sides, you have 3 of the four meausrments:

3, 4, and 6.  The other is the other side of the right triangle.  If you know your Pythagoran Trippels you know this must be a 3-4-5 traingle.  Otherwise:

$4^2+3^2=?^2$
$16+9=?^2$
$25=?^2$
$\sqrt{25}=\sqrt{?^2}$
$5=?$

So the unknown side is 5 because it is the hypotenuse of a right triangle.

That means you have the area of the two end triangle and the area of the three sides:

$2\left(\dfrac{1}{2}\times 3  \times 4\right)+3\times 6+4\times 6+5\times 6$

There are several ways to simplify or do that.

natalie1234 · Answer

oh so the answer is 84 then?

anonymous · Answer

good job helping @e.mccormick ;)

e.mccormick · Answer

Yep.  Do you see how I made that formula?  The two triangles are the first thing, then the three rectangles.

natalie1234 · Answer

yeah :D thank you so much!!

e.mccormick · Answer

np.  Have fun!

anonymous · Answer

@e.mccormick can you help someone if i tag you?