Question

find <BCD
in the given figure -​

Answer 1

Make a triangle that consists points B and C

Extend line AB : This makes a good triangle.

Now, AB extended is parallel to DE too.

Two angles inside the triangle will be 75° and 35°.

Sum of angles is always 180°

The remaining angle is ∠BCD.

180°-75°-35°=70°

Angle BCD is 70°