What type of angle is in the picture? math item stem image clear check , a=obtuse angle, b=acute angle, c=right angle, d=straight angle

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.