1 and 5 are supplementary angles.
1 and 5 form a linear par.
2 and 5 are vertical angles.
Why?
Two angles form a linear pair when their addition is equal to 180°, these types of angles are also called supplementary angles. The angles 1 and 5 are an example of a linear pair of angles.
Two angles are vertical when they are on the opposite sides and are equals. When two lines are crossed, there are vertical or opposites angles and both are equals. The angles 2 and 5 are vertical or opposites angles.
Two angles when their addition is equal to 180°, these types of angles are also linear pair form angles. The angles 1 and 5 are supplementary angles because they can add up to 180°.
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