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Mathematics 18 Online
OpenStudy (lana_mk):

Please help with math problem....

OpenStudy (lana_mk):

OpenStudy (ddcamp):

The surface area can be found by adding up all of the areas of the faces.

OpenStudy (ddcamp):

Let's start by finding the area of one of the tall sides. What's the base? What's the height?

OpenStudy (lana_mk):

@DDCamp The base is 5 right? the heights are 9.2 and 5.2

OpenStudy (ddcamp):

Where'd the 5 come from?

OpenStudy (lana_mk):

I meant 6. @DDCamp

OpenStudy (ddcamp):

OK, that's what I thought. So, if the base is six and the height is 9.2, what's the area of ONE of the tall triangles?

OpenStudy (lana_mk):

a=1/2(6)(9.2) =29.6

OpenStudy (lana_mk):

@DDCamp

OpenStudy (ddcamp):

That's the right equation, but that's not the answer my calculator got.

OpenStudy (ddcamp):

6 * 9.2 = 55.2 (1/2) * 55.92 = 27.6

OpenStudy (ddcamp):

Now, what's the area of the base?

OpenStudy (lana_mk):

@DDCamp wouldn't it be 27.6(3)? or 2

OpenStudy (ddcamp):

There are three triangles with area 27.6, and then the base triangle, in the total surface area.

OpenStudy (ddcamp):

I'd love to help more, but I need to get to class. Good luck with the rest of your problems!

OpenStudy (lana_mk):

Okay thanks @DDCamp

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