ABCD is a trapezium in which AB || DC and ∠A = ∠B = 60∘. Find ∠C and ∠D of the trapezium. [1 MARKS]
Concept : 0.5 Mark Calculation : 0.5 Mark Since AB || DC, A and D are supplementary. So are B and C. Thus C = D = 180∘ - 60∘= 120∘