Solution:
Since AB is parallel to CD, we have
Ð A + Ð D = 180° and Ð B + Ð C = 180°.
So Ð D = 180° - Ð A = 180° - 50°
Ð D = 130°
Ð B + Ð C = 180°
Ð C = 180° - Ð B
Ð C = 180° - 70°
Ð C = 110°

Directions:

Draw a trapezoid and explain the different properties of a trapezium, in your own words, with examples.