3.3.39 Line and plane in space
condition: The coordinates of the vertices of a certain triangle \( A B C: A(4 ; 2), B(12 ; 4), C(8 ; 1) \) are given. Find: a) the equation of the side \( B C \); b) the equation of the height drawn from the point \(A\); c) the equation of the median drawn from the point \(C\); d) equation of the bisector of the internal angle \(B\).
Straight lines and planes in space. Intersection of lines and planes, calculation of the distance of a line and a plane, angles between lines and planes, finding equations of lines and planes in space, and much more.