Question

What is the length of the side opposite the 60 degree angle?

Answer 1

The triangle has a total of 180 degrees in it , 180-90 = 90 . 90- 60 is 30

so its 30 degrees.

Answer 2

All triangles equal 180 so the answer would be set up as follows:
180-60-90 (right triangle) = 30 degrees
30 degrees is the answer