DHS - 3.2
№1.21. The vertices ∆ABC are given: А (–1; –4); B (9; 6); C (–5; 4). Find: a) Equation side AB; b) Equation of height CH; c) the median AM equation; d) the intersection point N of the median AM and the height of the SN; e) the equation of a straight line passing through the vertex C and parallel to the side AB; f) distance from point C to straight line AB.
№2.21. Make the equation of the median CM and the height CK of the triangle ABC; if A (4; 6); B (–4; 0); C (–1; –4).