1 All Physician Training licenses expire on August 31, 2015, are good for three years, and can only renew once (for a total of six years).  All Physician Assistant licenses expire on January 31 of even-numbered years.
Remember -- the sum of the degree measures of angles in any triangle equals 180 degrees. Below is a picture of triangle ABC, where angle A = 60 degrees, angle B = 50 degrees and angle C = 70 degrees. If we add all three angles in any triangle we get 180 degrees. So, the measure of angle A + angle B + angle C = 180 degrees. This is true for any triangle in the world of geometry. We can use this idea to find the measure of angle(s) where the degree measure is missing or not given.
A right triangle is a three sided figure with one angle equal to 90 degrees. A 90 degree angle is called a right angle which gives the right triangle its name. We pick one of the two remaining angles and label it c and the third angle we label d. The sum of the angles of any triangle is equal to 180 degrees. If we know the value of c, we then know that the value of d: 90 + c + d = 180.