Given the triangle with vertices A(1, 1), B(3, 7), and C(9,3).
(a) Determine the equation of the three lines drawn from each vertex to the midpoint on the opposite side. These lines are called the medians of the triangle.
(b) Determine the length of each median.
(c) show these medians intersect in a point which is 2/3 of the way from each vertex to the opposite side.