What is m 12? three horizontal lines g, h, and l are parallel and cut by a transversal. the angles formed on the left-hand side of the transversal are angles 1, 3, 5, 7, 9, and 11 starting from the top. the angles formed on the right-hand side of the transversal are angles 2, 4, 6, 8, 10, and 12 starting from the top. a)35° b)55° c)125° d)145°