This video explains about the rule of corresponding angles. When measuring the angle between the parallel lines (i.e.) Line1 and Line2 across the straight line. The angle A and angle B are equal. The angle C and angle D are equal. The angle E and angle F are equal. Finally angle G is equal to angle F. So, the angle between the parallel lines in all the angles are equal. Hence, this is the rule of corresponding angles. This video is very useful to basic high school geometry courses. Corresponding angles also consists of acute angle, obtuse angle, right angle. The angle A and angle B are corresponding angles. The angle C and angle D are corresponding angles. The angle E and angle F are corresponding angles. The angle G and angle H are corresponding angles. Use ruler to measure the angles between the line1 and line2. That is the parallel lines. Obviously, the angles between the intersection of parallel line makes the 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. Label the pair of nonadjacent angles, one interior and one exterior, on the same side of a traversal these paired angles are equal if the lines cut by the traversal are parallel. When a traversal cuts two parallel lines, corresponding angles are equal in size. Corresponding Angles are two congruent angles, both lying on the same side of the traversal and situated the same way on two different parallel lines. You have learned two facts about parallel lines. First, lines that are parallel do not intersect. Second, lines that are not parallel do intersect. Now we will learn about the angles of parallel lines.