Question

5. Find the mZABC if
ZABD = 35°, ZDBC = 55º.

Answer 1

`m\angle ABC=90^o`

Explanation:

see the attached figure to better understand the problem

we know that

`m\angle ABC=m\angle ABD+m\angle DBC` ----> by angle addition postulate

substitute the given values

`m\angle ABC=35^o+55^o=90^o`