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.
Not only do they have the same shape, but they are the same size as well. We use the following symbol to indicate congruence: It means not only are the two figures the same shape (~), but they have the same size (=). Two figures that are congruent have what are called corresponding sides and corresponding angles. That means that parts that are the same and would match up if you stacked the two figures. It is important to recognize that in a congruent triangle, each part of it is also obviously congruent.