Question

In the figure given below , find angle ABD. Also, find angle ABC,
if C = 3 ABC.

Answer 1

In the figure
BAD=180–100=80(linear pair)
Therefore, ABD= 180-(70+80)
=30
C=3(ABC)
180=100+x+3x
80=4x
X=20
So, C=20
Therefore ABC=180-(100+20)
ABC=60
Hope this helped