In the straightedge and compass construction of the perpendicular line
below, how do you know that AB | CD?
OA. The angles at the intersection of the two lines can be proven to be
congruent, so they meet at a right angle and the lines are
perpendicular.
B. The angles at the intersection of the two lines can be proven to be
congruent and supplementary, so they meet at a right angle and
the lines are perpendicular.
C. The angles at the intersection of the two lines can be proven to be
supplementary, so they meet at a right angle and the lines are
perpendicular.
D. The angles at the intersection of the two lines can be proven to be
congruent and complementary, so they meet at a right angle and
the lines are perpendicular.