Question 882172
In a parallelogram, opposite angles are congruent (same measure), and adjacent angles are supplementary (measures add up to {{{180^o}}} ),
so if one angle measures {{{40^o}}} ,
another angle will also measure {{{40^o}}} ,
and the measure of each of the other two angles will be
{{{180^o-40^o=140^o}}} .
{{{drawing(300,100,-3,27,-2,8,
line(0,0,7.66,6.43),line(23.66,6.43,7.66,6.43),
line(0,0,16,0),line(16,0,23.66,6.43),
locate(2,2.5,40^o),locate(19.2,6.8,40^o),
locate(7.2,6.8,140^o),locate(13.5,2.5,140^o)
)}}}