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Math Help - coordinates triangle

  1. #1
    Member helloying's Avatar
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    coordinates triangle

    coordinates of triangle ABC are A(1,5) B(4,4) C(8,6). Given that P is the foot of the perpendicular from A to BC, find eqn of P and coordinates of P. I do not understand the question, wat does it mean by the foot?
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  2. #2
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    Foot is the point where the perpendicular line segment intersects the line segment BC.
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  3. #3
    Member helloying's Avatar
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    Quote Originally Posted by hwhelper View Post
    Foot is the point where the perpendicular line segment intersects the line segment BC.
    I still don really know how to do this question. Am i correct to find the slope of BC and then find the slope of the perpendicular line and then find the two eqn and then solve it?
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  4. #4
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    Yep. Find the equation of line BC, find the equation of line AF where F is the foot (B-F-C). Intersection point of those two lines is F.
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  5. #5
    Member helloying's Avatar
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    Thanku very much i can find all the points already. however there is more last part that i dont know how to solve which is the length of perpendicular from B to AC.
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