Question

use this figure for questions 1 through 4 1. are angles 1 and 2 a linear pair?2. are angles 4 and 5 a linear pair ?3.are angles 1 and 4 vertical angles?4. are angles 3 and 5 vertical angles ?

Answer 1

Linear pair angles form a straight line, so, both angles add up to 180°.

1 and 2 are not a linear pair.

4 and 5 are a linear pair.

Vertical angles are opposite angles, that are equal.

1 and 4 are vertical angles

3 and 5 are NOT vertical angles-