14 points find the value of x

Which math sentence can be used to determine if the triangle is a right triangle?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8

Which lines are parallel? justify your answer. lines p and q are parallel because same side interior angles are congruent. lines p and q are parallel because alternate exterior angles are congruent lines l and m are parallel because same side interior angles are supplementary lines l and m are parallel because alternate interior angles are supplementary.