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eroshea Group Title

Find the volume of a regular tetrahedron whose altitude measures 10 cm.

  • 2 years ago
  • 2 years ago

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  1. hartnn Group Title
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    the formula is V = \(\sqrt 2\)/12 * a^3

    • 2 years ago
  2. eroshea Group Title
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    it is not the edge that is given but the ALTITUDE..

    • 2 years ago
  3. eroshea Group Title
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    now i got it.. :))

    • 2 years ago
  4. Miyuru Group Title
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    How ?

    • 2 years ago
  5. eroshea Group Title
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    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

    • 2 years ago
  6. Miyuru Group Title
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    I thought it like this..\[\large\color{green}{x=\frac{100}{\sqrt{3}}}\] |dw:1353600894733:dw|

    • 2 years ago
  7. Miyuru Group Title
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    Sorry..\[\large\color{green}{x=\frac{10}{\sqrt{3}}}\]

    • 2 years ago
  8. eroshea Group Title
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    that's fine.. ^^

    • 2 years ago
  9. Miyuru Group Title
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    ;)

    • 2 years ago
  10. Miyuru Group Title
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    @eroshea I am glad tht u got it..:D :)

    • 2 years ago
  11. eroshea Group Title
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    thanks for your help @hartnn and @Miyuru ^^

    • 2 years ago
  12. Miyuru Group Title
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    I didn't help.. o.O

    • 2 years ago
  13. Miyuru Group Title
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    Thank @hartnn ONLY

    • 2 years ago
  14. eroshea Group Title
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    well, you tried helping me.. so thanks :))

    • 2 years ago
  15. hartnn Group Title
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    u got it on your own, @eroshea :)

    • 2 years ago
  16. Miyuru Group Title
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    Is my way wrong @hartnn

    • 2 years ago
  17. hartnn Group Title
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    if u got the same volume, then u are correct.

    • 2 years ago
  18. Miyuru Group Title
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    It's nearly 181.4 :(

    • 2 years ago
  19. hartnn Group Title
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    then incorrect :P

    • 2 years ago
  20. Miyuru Group Title
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    :D

    • 2 years ago
  21. eroshea Group Title
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    :D

    • 2 years ago
  22. Miyuru Group Title
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    OHH Anyway thnks for U all and Welcome...

    • 2 years ago
  23. Miyuru Group Title
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    Ohh @eroshea you mean the height is 10.. Isn't it ?

    • 2 years ago
  24. eroshea Group Title
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    yes

    • 2 years ago
  25. Miyuru Group Title
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    I thought it was the altitude of a triangle.. :P

    • 2 years ago
  26. eroshea Group Title
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    no.. it's the height of the tetrahedron

    • 2 years ago
  27. Miyuru Group Title
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    Ok got it.. :) Then your way is correct. :D

    • 2 years ago
  28. eroshea Group Title
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    yep :D

    • 2 years ago
  29. kneenutskii Group Title
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    what is the figure and where did 2/3 came from?

    • one year ago
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