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    klaus13239's Avatar
    klaus13239 Posts: 18, Reputation: 1
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    #1

    Oct 26, 2008, 11:04 AM
    How do you find the sa/v of a 5 tetrahedron
    I'm in 8th grade and my geo teacher gave this as a assigment what I'm doing is making it out of 2 by 6 pieces of paper if any one can help me please do this is so *censored* evil :confused::confused::confused::confused: ty if you can

    <><don't fear the reaper we all die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #2

    Oct 26, 2008, 11:05 AM

    *takes out a chewy bar and eats it while waiting*
    <><don't fear the reaper we all die eventually><>
    ISneezeFunny's Avatar
    ISneezeFunny Posts: 4,175, Reputation: 821
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    #3

    Oct 26, 2008, 11:07 AM

    Well, the surface area of a tetrahedron is 4*(area of each side).

    Since a tetrahedron is made of 4 triangles, 4*(1/2*base*height)

    The volume is simply (1/3)*(area of base)*(height)

    As far as making a tetrahedron

    http://www.mathsisfun.com/geometry/i...dron-model.gif

    Not sure what you mean about "5 tetrahedron"
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    klaus13239 Posts: 18, Reputation: 1
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    #4

    Oct 26, 2008, 11:07 AM

    *takes out anthor chewy bar and eats that one*
    <><don't fear the reaper we all die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #5

    Oct 26, 2008, 11:08 AM
    What I mean bye 5 tetrahedron is show as my image 5 interlocking triangles
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    klaus13239 Posts: 18, Reputation: 1
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    #6

    Oct 26, 2008, 11:09 AM
    *picks up trash from chewy bars and takes out anthor one*
    <><don't fear the reaper we all die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #7

    Oct 26, 2008, 11:11 AM

    *eats last of chewy bars then goes and orders a cheese pizza*
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    klaus13239 Posts: 18, Reputation: 1
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    #8

    Oct 26, 2008, 11:13 AM

    *take out mp3 and starts listening waiting for help*
    <><don't fear the reaper we all die eventually><>
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #9

    Oct 26, 2008, 11:17 AM
    Quote Originally Posted by klaus13239 View Post
    what i mean bye 5 tetrahedron is show as my image 5 interlocking triangles
    Are you sure? There are no 5 sided isohedra. (tetra means 4, it's from greek)
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    klaus13239 Posts: 18, Reputation: 1
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    #10

    Oct 26, 2008, 11:19 AM

    Really? Well try explaing that to my teacher let me give you a link I found for it
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    klaus13239 Posts: 18, Reputation: 1
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    #11

    Oct 26, 2008, 11:20 AM

    Here one url I found let me find the other
    Origami Geometric Constructions
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    klaus13239 Posts: 18, Reputation: 1
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    #12

    Oct 26, 2008, 11:21 AM

    Here the other url
    Instructions for making the compound of 5 tetrahedrons
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #13

    Oct 26, 2008, 11:23 AM

    That's a "compound of 5 tetrahedrons" not a "5 tetrahedron"! Anyway now we are on the same page!
    klaus13239's Avatar
    klaus13239 Posts: 18, Reputation: 1
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    #14

    Oct 26, 2008, 11:24 AM

    Okay so can u help meh?
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    klaus13239 Posts: 18, Reputation: 1
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    #15

    Oct 26, 2008, 11:24 AM
    And I'm sorry about confusing both of us
    <><don't fear the reaper we all will die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #16

    Oct 26, 2008, 11:28 AM

    *sees pizza guy coming and goes to get cash for pizza*
    <><don't fear the reaper we all will die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #17

    Oct 26, 2008, 11:47 AM

    *leaves to go to Google to find it*
    <><don't fear the reaper we all will die eventually><>
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    klaus13239 Posts: 18, Reputation: 1
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    #18

    Oct 26, 2008, 12:39 PM

    Ronly I am so ronly
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