ABCD is a parallelogram. AB = 8 cm, AD = 4 cm, ∠B = 120°
(a) What is ∠A?
(b) What is the perpendicular distance from D to AB?
(c) What is the area of ABCD?
(a) ∠A + ∠B = 180 (Consecutive angles of parallelogram)
∠A + 120 = 180
∠A = 180 – 120
∴ ∠A = 60
