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triangle has two angles with measures of 16 degrees and 64 degrees . what is the degree measure of the third angle

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SmarticalParticals
The total of internal angles of a triangle always adds up to 180 degrees.  Since we know 2 of the 3 angles we can find the missing angle.

64 degrees + 16 degrees = 80 degrees

This is 2 of the 3 angles. 
The 3rd angle will be 180 - 80 = 100 degrees

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