Question

Two angles measure (30-a)° and (123-2a)°, if each one is corresponding angles of the other then find a.

Answer 1

Answer:

Sum of supplementary angles is 180∘

∴(30−a)∘+(125+2a)∘=180∘⇒a+155∘=180∘⇒a=180∘−155∘=25∘