Marisol constructed a triangle. One angle in the triangle had a measure of 40*. Another angle in the triangle had a measure of 80*. What is the measure, in degrees, of the third angle in Marisol’s triangle?

A triangles angle always equal to 180 degrees. So if you add up what you already have which is 80+40=120. To find the 3rd angle you subtract 180-120=60. So, the 3rd angle is 60 degrees. 
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