Question

Line k is parallel to line l.

Lines k and l are parallel. Lines m and n intersect to form 2 triangles. The top triangle has angles 1, 2, 3 and the bottom triangle has angles 4, 5, 6.

Which angle is congruent to Angle 4?
Angle 1
Angle 2
Angle 5
Angle 6

Answer 1

Angle 2.

Reason: Lines m and n intersect, so the angles at their intersection that point up (angle 2) and down (angle 4) are vertical angles, and vertical angles are congruent.