Mary wants to get spray foam insulation in her attic space. Shown here is a diagram of her attic – is the spray foam costs $3.15 per cubic meter, how much will it cost Mary to get her whole attic done?

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.