Question

In the trapezium ABCD, the measure of ∠D is

(a) 55° (b) 115° (c)135° (d) 125°

Answer 1

(d) 125^o

By observing the given figure ∠D and ∠A are supplementary.

We know that, sum of supplementary angle is equal to 180^o.

Then, ∠D + ∠A = 180^o

∠D + 55^o = 180^o

∠D = 180^o – 55^o

∠D = 125^o