View Full Version : quick maths question sorry

07-28-2002, 02:05 PM
I know the volume of a pyramid is 1/3 * base area * height.
but cant remember why a 1/3 can someone please tell me why.

thanks for all the help.

07-28-2002, 02:29 PM
because it will be a cube if u dont *1/3 it

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damn didnt work :mad:

07-28-2002, 02:34 PM
> damn didnt work
Try putting it in a tag that formats text ... say like, code tags.

07-28-2002, 02:43 PM
more info of why it would be a cube hard to put this question in words but here goes.

the volume of a triangle is 1/2 * base * height this is divided by 2
because it would otherwise be a square/rectangle ie two congruent triangles together, so what would make the pyramid a cube(three congruent pyramids assembled together)!.

thanks for a more fuller explanation.

07-28-2002, 04:25 PM
the derivation requires integral calculus. If you want I can give you one or just look around here http://www.mathforum.org/dr.math/faq/ and save me the trouble

07-28-2002, 04:25 PM
sorry I mean area not volume of a triangle.

07-28-2002, 08:25 PM
Math never ceases to amaze me. I really wish I'd paid more attention in math class...