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Homework Help: Triangle plane surface 2m base and 3 height

  1. Apr 22, 2012 #1
    Hello ..

    This is a question with answer , From where " 1 " in the solution ?

    http://store1.up-00.com/Mar12/yd170715.jpg [Broken]
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Apr 22, 2012 #2
    see here

    http://store1.up-00.com/Mar12/uK579693.jpg [Broken]
    and
    http://store1.up-00.com/Mar12/D4a79693.jpg [Broken]
     
    Last edited by a moderator: May 5, 2017
  4. Apr 22, 2012 #3
    where are you ?
     
  5. Apr 23, 2012 #4
    similar question , but here first find angle

    http://store1.up-00.com/Mar12/61270702.jpg [Broken]
     
    Last edited by a moderator: May 5, 2017
  6. Apr 23, 2012 #5
    Where are you ??
    that question which I want only about sin

    sin = o/h

    but my Q now
    h= 1 why
    is because 3/3
    or 2 / 2
    or what please help me
     
  7. Apr 23, 2012 #6
    Your question is unclear to me.
     
  8. Apr 23, 2012 #7
    I mean
    sin30 = y/1
    So Xbar = 1.5 + y
    So Xbar = 1.5 + 1Xsin30

    Now my question from where we got (one)
    Is by divide 3/3 as (h/3 ) = 1 or what ?.

    please I want your help ?
     
  9. Apr 23, 2012 #8
    The base of the triangle is the part closest to the surface. If triangle height is 3, the centroid of a triangle is 1/3 the distance from the base to the apex opposite the base. 1/3 of 3 is 1 and 1 is the hypotenuse.
     
  10. Apr 23, 2012 #9
    thanks sooooooooooo much .. where are you before ... ^)^ ?
     
  11. Apr 23, 2012 #10
    Mowing the front lawn.
     
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