Question

In the figure AB || DE , angle ABC =140° and angle CDE =100°. Find angle BCD . for class 9

Answer 1

40°. We know that angle abc =BCf as alternate interior angle . (construct cf on c).
angle cde =angle bcfalternate angles
so 140-100=40
hence bcd=40°

Answer 2

Answer:

In the figure AB || DE , angle ABC =140° and angle CDE =100°. Find angle BCD . for class 9. 1.