DAX =

\(\angle DAX = \angle ZAX - \angle ZAD\)

\(\angle ZAD\) = 180° - \(\angle ZAB\) - \(\angle BAD\) = 180° - 0° = 180°

\(\angle ZAX\) = 180° - \(\angle ZAB\) - \(\angle BAX\) = 180° - 160° = 20°

\(\angle DAX\) = 20° - 180° = 160°

Ответ: 160°