Question

When do you use linear pair postulate?

Answer 1

1. Where the angles in a linear pair are supplementry, and if parallel lines are cut by a transversal, then the interior angles are congruent, and if two lines are cut by a transversal so that a pair of alternate interior angles are congruent, then the two lines are parallel. That's what makes up a linear pair postulate anyway.
2. If two adjacent angle's unshared sides form a straight angle, then they are a linear pair.
3.If two angles form a linear pair,then they are supplementary.