What are corresponding angles?

Answer 1

For any pair of parallel lines 1 and 2, that are both intersected by a third line, such as line 3 in the diagram below, angle A and angle C are called corresponding angles. Corresponding angles have the same degree measurement. Angle B and angle D are also corresponding angles.

On a piece of paper, draw a horizontal line. Now, draw a diagonal line that bisects this line. You have now created four angles.

Over the line, label the angles A and B, from left to right. Under the line, label the angles C and D, this time right to left.

Angles A and C are corresponding angles, as they have the same degree measurement, and angles B and D are corresponding angles for the same reason.

To answer your next question, angles A and B and angles C and D are complimentary angles as their degree measurements add up to 180. The same can be said for angles A and D and angles B and C.

any pair of angles that have the same relative position at each intersection where a straight line crosses two others