While tooth decay is often the primary cause of a toothache, it's important for you to have a complete oral examination to determine the cause. Other causes of a toothache can include the following: 1  Infection. 2  Gum disease. 3  Grinding teeth (bruxism). 4  Tooth trauma. 5  An abnormal bite.
Thus the formal definition of corresponding sides can be stated as follows: In two or more different plane figures, the sides that are in the same position but in different plane figures are called corresponding sides.
In the figure at the left, angles 1 and 3 are corresponding angles. Angles 2 and 4 are also corresponding angles. Corresponding angles are pairs of angles formed when a third line (a transversal) crosses two other lines. These angles are on the same side of the transversal and are in the same relative position.