1 Answer

Roseann Solano · Answer 1 · 2021-02-27T02:39:45+0000

Answer:

$m\angle ABC=90^o$

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

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

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