Question:
In trapezium ABCD with AB||CD, if ∠A = 100o, then ∠D = __________.
Solution:
In trapezium ABCD with AB||CD, if ∠A = 100o, then ∠D =80o.
We know that, in trapezium adjacent angles of non – parallel sides are supplementary.
∠A + ∠D = 180o
100o + ∠D = 180o
∠D = 180o – 100o
∠D = 80o