In which diagram do angles 1 and 2 form a linear pair?
Answer
A
Image with description 2 rays emerge from the center of the horizontal line. Angles are labeled from left to right as 1, 2, and 3.
B
Image with description Two lines intersect at a point. The vertical angles are named as 1 and 2, respectively.
C
Image with description 3 rays emerge from a common vertex point to form two angles. Angles are labeled as 1, and 2. Both angles add up together to form a right angle.
D
Image with description Angles 1 and 2 have a common vertex and a common side. They both lie in a straight line.