Question

find the external angle at b​

Answer 1

Answer:

40 is answer ..

hope it helps you plz plz plz mark my answer as brainlyiest......

Answer 2

Hey mate here is your answer::

by using linear sum property the sum of external angle + internal angle 180 degree..

Now,,let the external angle b= x

than ::::x+internal angle or angle ABC= 180 degree

x + 40 degree= 180 degree

x = 140 degrees...

Hope it helps u...keep smiling and stay safe...(^_^)..