DHS - 3.2
№1.6. The vertices ∆ABC are given: A (–2; –3); B (1; 6); C (6; 1). 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; e) the distance from point C to line AB.
№2.6. Prove that the quadrilateral ABCD is a trapezoid; if A (3; 6); B (5; 2); C (–1; –3); D (–5; 5).