Math nerd question!

[SapphireSara3]

Ok, so I'm doing this project in math and I have to find the surface area & volume of a building. It's an irregular octagonal prism & the roof is an irregular octagonal pyramid. I found the surface area by breaking up the shapes and adding them together, but Im stuck on the volume. I know how to find the prism part of it, but how would I find the roof? sweatdrop

 

[SapphireSara3]

I'll be inviting people now until my math teacher e-mails me back or somebody here can answer. :]

 

[Ater Vulpes]

Ehhh, not really sure what the question is, but the volume of a pyramid is always a third of the area of the base times the height, or 1/3Bh

 

[SapphireSara3]

>>

Yeah, I know but now I think it's not even a pyramid. D:
It's like ... I don't even know what it is, actually.

<<

 

[Ater Vulpes]

Okaaay then.
Wazzit look like?

 

[SapphireSara3]

uhm well it is basically an octagonal pyramid but longer.. you know what I mean?

Waiit I have a picture! I'll go upload that. sweatdrop

Swet here it is.
 

[Nisa the Brown Nose Clown]

I have no clue but my logical guess is,

s1*s2*s3*s4*s5*s6*s7*s8*h

Thats my guess. Get the measurement of each edge, I think, and use the pathagreom therom(sp?) to get the height.

 

[Enobmah Shardtrace]

Yeah, I agree with Nisa. Doing that will be the most effective way of finding the measurement. wink  

[Nisa the Brown Nose Clown]

=-D

 

[SapphireSara3]

Thank you ;D
I think that should work...