Posted by Sally on .
In right triangle ABC what is the arithmetic mean (average), in degrees, of the measures of the two smallest angles?
Explain how the answer is 45 degrees.

Math 
Dr. Jane,
A triangle has a total of 180 degrees.
Since the right angle = 90 degrees.
There is a total of 90 degrees left for the other two angles.
Their sum divided by 2 gives the arithmetic mean of 45 degrees