Question

Which of the following is a valid reason for stating thatangle 1 is congruent to angle 2?
a vertical line and a horizontal line, intersecting at a right angle, the angle above and to the right of the point of intersection is labeled 2, the angle below and to the right of the point of intersection is labeled 1
A. Angles 1 and 2 are adjacent because they share a common side
B. Angles 1 and 2 are both right angles because the lines are perpendicular
C. Angles 1 and 2 are supplementary angles because they form a straight line
D. Angles 1 and 2 are vertical angles because they are opposite