Question

In the diagram, line m is parallel to line n.

What is the measure, in degrees, of angle ABC?

Answer 1

m∠ABC = 55°

Explanation:

m∠BAC = 50° because ∡BAC ≅ ∡DCA

since there are 180° in ΔABC the m∠ABC = 180-(75+50) which equals 55°