Which best describes perpendicular lines? A) 2 lines intersecting at a right angle B) 2 lines intersecting at more than 1 point C) 2 lines never intersecting or D. 2 lines starting at the same point

A) 2 lines intersecting at a right angle

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct