If the Pythagorean theorem triangle has 37 degrees on the upper left corner of the triangle, and 42 degrees on the bottom left corner of the triangle, what is the measure of the exterior angle x?

To find the measure of the exterior angle, we need to sum up the measures of the two interior angles adjacent to it.

The measure of the exterior angle would be equal to the sum of the measures of the other two angles: 180 degrees - (37 degrees + 42 degrees) = 180 degrees - 79 degrees = 101 degrees.

Therefore, the measure of the exterior angle x is 101 degrees.