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January 30, 2015

January 30, 2015

Posted by **Sally** on Monday, March 11, 2013 at 3:05pm.

Explain how the answer is 45 degrees.

- Math -
**Dr. Jane**, Monday, March 11, 2013 at 3:07pmA 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

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