Two of the angles in a triangle measure 50° and 27°. find the measure of the third angle.

The answer would be 103

Here is why

So if you do 50 + 27 the equals 77

As you know there is 180 degrees in a triangle you would take 118 - 77

That is the answers 103

But what you also could do to check it was right is do it the opposite way round and see if you get the same answer

The sum of the angles in a triangle is 180°. So ...

50° + 27° + x = 180°

77° + x = 180°

Subtract both sides by 77°:

x = 103°

The measure of the third angle is 103°.