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.
Some triangles will have one angle that is exactly 90 degrees. Those are right triangles because one angle is 90 degrees. (The other two angles must be acute because they must add up to 90 degrees.) Some triangles will have one angle that is more than 90 degrees. Those are obtuse triangles because one angle is obtuse. (The other two angles are acute because the sum of the other two triangles is less than 90 degrees). Some triangles will have all three angles less than 90 degrees. Those are the acute triangles. Go ahead, start with a right triangle.