Đáp án:
$ \widehat{yoz}=30⁰$
$\widehat{mon}=35⁰$
$\widehat{tox}=160⁰$
Giải thích các bước giải:
$\widehat{yoz}=\widehat{xoy}-\widehat{xoz}=70⁰-40⁰=30⁰$
$\widehat{mon}=\frac{1}{2}(\widehat{zox}+\widehat{yoz})=\frac{1}{2}\widehat{xoy}=35⁰$
$\widehat{xot}=180⁰-\widehat{xom}$
=$180⁰- \frac{1}{2}\widehat{xoz}$
=180⁰-20⁰=160⁰