anonymous
  • anonymous
Find the volume of a regular tetrahedron whose altitude measures 10 cm.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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hartnn
  • hartnn
the formula is V = \(\sqrt 2\)/12 * a^3
anonymous
  • anonymous
it is not the edge that is given but the ALTITUDE..
anonymous
  • anonymous
now i got it.. :))

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More answers

anonymous
  • anonymous
How ?
anonymous
  • anonymous
altitude = root(2/3) * a 10 = root(2/3) * a 100=2/3 a^2 a= 5 root 6 V = root(2)/12 * a^3 V = 216.5
anonymous
  • anonymous
I thought it like this..\[\large\color{green}{x=\frac{100}{\sqrt{3}}}\] |dw:1353600894733:dw|
anonymous
  • anonymous
Sorry..\[\large\color{green}{x=\frac{10}{\sqrt{3}}}\]
anonymous
  • anonymous
that's fine.. ^^
anonymous
  • anonymous
;)
anonymous
  • anonymous
@eroshea I am glad tht u got it..:D :)
anonymous
  • anonymous
thanks for your help @hartnn and @Miyuru ^^
anonymous
  • anonymous
I didn't help.. o.O
anonymous
  • anonymous
Thank @hartnn ONLY
anonymous
  • anonymous
well, you tried helping me.. so thanks :))
hartnn
  • hartnn
u got it on your own, @eroshea :)
anonymous
  • anonymous
Is my way wrong @hartnn
hartnn
  • hartnn
if u got the same volume, then u are correct.
anonymous
  • anonymous
It's nearly 181.4 :(
hartnn
  • hartnn
then incorrect :P
anonymous
  • anonymous
:D
anonymous
  • anonymous
:D
anonymous
  • anonymous
OHH Anyway thnks for U all and Welcome...
anonymous
  • anonymous
Ohh @eroshea you mean the height is 10.. Isn't it ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
I thought it was the altitude of a triangle.. :P
anonymous
  • anonymous
no.. it's the height of the tetrahedron
anonymous
  • anonymous
Ok got it.. :) Then your way is correct. :D
anonymous
  • anonymous
yep :D
anonymous
  • anonymous
what is the figure and where did 2/3 came from?

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