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Thread: Inscribed triangle

  1. #1
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    Inscribed triangle

    On the plane xy, there are four points; O (0,0), A (0,3), B(0,-3) , C(4,0).

    When point D is the intersection of bisector of \angle ABC and x-axis, then
    OD : DC = ____: _____ and the coordinates of the inner center of \triangle ABC are .....

    somebody has a tip?

    Answer: 3:5
    (3/2;0)
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  2. #2
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    Re: Inscribed triangle

    Area of triangle ABC = area of triangles ADC + BDC + ADB
    Attached Thumbnails Attached Thumbnails Inscribed triangle-incenter.png  
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  3. #3
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    Re: Inscribed triangle

    Quote Originally Posted by skeeter View Post
    Area of triangle ABC = area of triangles ADC + BDC + ADB
    thanks a lot!
    which program do you used to do this drawing?
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