Which angle below is an obtuse angle? Vertical lines AC and BE are parallel to each other. Line CD, drawn from point C is perpendicular to lines AC and BD. Line CD intersects line BE at point D. Points A and D are joined by a diagonal. A. ∠ A D B B. ∠ A C D C. ∠ A D C D. ∠ A D E 2 / 5 1 of 5 Answered