Question 307982: if two angles of a triangle measure 40 degrees and 70 degrees, what is the measure of the third angle?
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! The sum of the angles of a triangle is 180 degrees. To find the third angle, add the first two together, and subtract this from 180.
In this case, 40+70=110. Subtract 180-110= 70 degrees.
As a check, add the three angles and see if it comes out to 180 degrees.
40+70+70= 180, so it checks.
Dr. Robert J. Rapalje, Retired
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