When you have two parallel lines like AB and CD and a transversal line like EF you have to know that the angles will be as follow:
All the angles with the color red will be the same between them and the ones in color green will be the same between them because the angles opposite the vertex (the union between two transversal lines) are congruent or equal:
So the answer is:
The angles H and K are equals and the why is the explanation above
