In the Triangle ABC, A=50, C=26 and AB is produced to D. Find ABC(B angle) and CBD(B angle). Answers are 104 and 76?

Answer 1

that is correct.
The external angle is the sum of the other two interior angles.
The two angles at B form a linear pair.

Answer 2

Sir can you further explain it specially CBD(B angle)

Answer 3

The exterior angle at B (CBD) is the sum of the other two interior angles at A and C.
The two angles at B (CBD and CBA) form a linear pair.

Looks like you need to review the section on triangles.

Answer 4

I was confuse at AB is produced at D,but
now I got it,thanks Sir...