If a triangle has one angle that measures 62.5o and another angle that measures 77o, then what is the measurement of the last angle?

40.5 degrees

Step-by-step explanation:

A triangle's angles all add up to 180 degrees, so to solve this all you need to do is add the two numbers you have and subtract them from 180.

62.5+77+x=180

139.5+x=180

-139.5 - 139.5

x=40.5