Question

In triangle ABC, measure angle ACD=110° is an exterior angle, measure angle A=65°,find measure angle B?

Please help me answer this question ?​

Answer 1

Answer:

by the theorem on remote exterior angle ..

..the measure of the exterior angle is equal to the sum of the remote interior angles..

thus ..

.. angle ACD=angle BAC +angle ABC

..110=70+angle ABC..

..angle ABC=110-70

angle ABC=40°

Step-by-step explanation: