When two lines intersect, four angles are created. Opposite angles are equal, therefore, we have two sets of angles with the same measure. Adjacent angles are supplementary.
By definition, supplementary angles add up to 180º. Since in our intersection we have an angle of 25º, the adjacent angles will be 180º minus 25º.
[tex]180-25=155[/tex]The measure of the other angles are 155º.
