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Can the sum of angles of a planar triangle be greater than 180?

  1. Feb 9, 2009 #1
    Can the sum of angles of a planar triangle be greater than 180??

    hii

    i read somewhere that the sum of the angles of a triangle is always a little bit greater than or lesser than 180 degrees? how true is that?

    thank you
     
  2. jcsd
  3. Feb 9, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi hermy! Welcome to PF! :smile:
    It's true on the Earth's surface …

    on a sphere, the sum of the angles minus 180º is proportional to the area of the triangle …

    but it's not true on a plane: the sum is always exactly 180º. :smile:
     
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