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dfresenius
 3 years ago
Using integrals, how do you find the volume of a equilateral triangle based pyramid with height h? let a equal one side of the triangular base
dfresenius
 3 years ago
Using integrals, how do you find the volume of a equilateral triangle based pyramid with height h? let a equal one side of the triangular base

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slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1Ha, good question. Hmm, I think it would be best to define a pyramid in terms of planes, and then using rectangular coordinates to solve

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1354836422356:dw

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0@Algebraic! hey Chief, can you help me out with this volume problem?

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1354836727530:dw

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1http://mathhelpforum.com/calculus/107926findvolumedescribedsolid.html

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0How does he get A=root(3)/2 (a^2)

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1That's using pythagoras. Then the area is just A=bh/2

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1hmm weird, i'd get A=root(3)/4 (a^2)

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0Huh. That is weird. That's what I got also.

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1he made a mistake it seems. \[A = {\sqrt 3 \over 4} \times a^2\]

dfresenius
 3 years ago
Best ResponseYou've already chosen the best response.0Would that mean this his equation for S(r) is wrong also?

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.1I think S(r) is correct.
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