they are parallel.
the two lines are both perpendicular to the same Line therefore they are parallel
we know MA is perpendicular to AT because 58 + 32 is 90. The 2 lines form a 90 degree angle. that is the definition of perpendicular
we know TH is perpendicular to AT because 46 + 44 is 90. The 2 lines form a 90 degree angle. that is the definition of perpendicular
