No. 1 Given are the vertices of ∆ABC: A (–2; –3); In (1; 6); C (6; 1). Find: a) The equation of the side AB; b) Equation of height CH; c) the equation of the median AM; d) the point N of the intersection of the median AM and the height of the CH; d) the equation of a line passing through the vertex C and parallel to the side AB; e) the distance from point C to line AB.

№2 Prove that the quadrangle ABCD is a trapezoid; if A (3; 6); B (5; 2); C (–1; –3); D (–5; 5).