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Math Help - equilateral triangles

  1. #1
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    equilateral triangles

    how do you express the area of an equilateral triangle as a function of
    a)the length of each side (l)
    b)the altitude (h)
    i have no idea how to work this out..so any help would be greatly appreciated
    thanks guys=]
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  2. #2
    Like a stone-audioslave ADARSH's Avatar
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    Quote Originally Posted by ella85 View Post
    how do you express the area of an equilateral triangle as a function of
    a)the length of each side (l)
    b)the altitude (h)
    i have no idea how to work this out..so any help would be greatly appreciated
    thanks guys=]
    altitude of a an equilateral triangle = side * \sqrt{3}/2

    use trigonometry or geometry(Pythagoras theorem) to prove above thing

    Area of a triangle =Base*Altitude/2


    This will be enough for you to go ahead
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