ABCD is a trapezium in which AB || DC
Question:

ABCD is a trapezium in which AB || DC and ∠A = ∠B = 45°. Find angles C and D of the trapezium.

Solution:

Given, ABCD is a trapezium and whose parallel sides in the figure are AB and DC.

Since, AB || CD and BC is transversal, then sum of two cointerior angles is 180°.

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