<span>Without changing the opening of your compass, put the sharp end
of your compass on point C and make an arc on the ray. Label the point
where the arc intersects the ray point D. Segment CD is congruent to
segment AB.</span>
It would be 56 degrees since it's a vertical angle and to get the obtuse angles you just subtract 180 from 56 and there's your answer. Hope this helped! (':
