Question

1. choose true or false.

a pair of adjacent angles whose noncommon sides are two opposite rays that form a straight line are vertical angles.
○ false
○ true

1. choose true or false.

two nonadjacent angles formed by two intersecting lines are vertical angles.
○ true
○ false

Explanation:

Question 11

Adjacent angles with non - common sides as opposite rays forming a straight line are supplementary (linear pair), not vertical angles. Vertical angles are non - adjacent and formed by intersecting lines. So the statement is false.

By the definition of vertical angles, when two lines intersect, the two non - adjacent angles formed are vertical angles. So the statement is true.

Answer:

False

Question 12