Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.
From the figure, ∠A = 48 + 48 = 96. Since the sum of any two adjacent angles of a parallelogram equals 180°, we have ∠A + b = 180 or 96 + b = 180. Solving for b yields b = 180 – 96 = 84. The answer is (D).