Determine the value of k so that Z) = [2, 5] and 3) = [k, 4] are perpendicular. Determine the interior angles of AABC for A(5, 1), B(4, -7), and C(-1, -8). Given vectors > = [6, 5] and z) = [1, 3], find pro]? >. Resolve > into perpendicular a a a components, on of which is in the direction of 3)