Question

5. Look at the diagram below. Indicate whether the angles below are

adjacent or vertical.


a <1 and <2
b. <3 and <4
C. <2 and <4
d. <1 and <3

Answer 1

a. adjacent

b. adjacent

c. vertical

d. vertical

Explanation:

Adjacent angles share a side; vertical angles do not. Vertical angles share a vertex and have sides that are opposite rays.

In the diagram, adjacent angles are sequentially numbered, so numbers that differ by 1 (or 3) are adjacent angles.

Vertical angles are not adjacent, so will have angle numbers that differ by 2.

adjacent: (a) and (b) . . . angles 1&2, 3&4

vertical: (c) and (d) . . . angles 2&4, 1&3