corresponding angles
In geometry, angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, corresponding angles are equal.
Corresponding angles are equal when lines are parallel.
Find the angle using the property of corresponding angles.
Vertically opposite angles formed by two intersecting lines; 同位角 involve a transversal crossing two lines.
Compound of 同位 (same position) and 角 (angle), directly describing the geometric concept.