Corresponding Angles

The angles which occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal.

corresponding angles

∠MOL and ∠QRO are corresponding to one another, therefore, ∠MOL = ∠QRO.

Also,

∠LOP = ∠ORS

∠MOR= ∠QRT

∠POR = ∠SRT