Question

If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other one

also.
Given: k⊥m, m║n
Prove: k⊥ n

Answer 1

the right angle up at the number one and the unknown angle down at 2 are corresponding angles. corresponding angles are congruent. therefore angle down by two is a right angle and so the transversal is perpendicu lar to both lines