Corresponding Angle
Two lines a and b are cut by a third line c. The angles that are on the same side of the cutting line c and on the same side of the two lines a and b are called corresponding angles. When lines a and b are cut by a third line c, 'three lines and eight angles' appear, which include 4 pairs of corresponding angles, 2 pairs of alternate interior angles, and 2 pairs of same-side interior angles.
