Algebra Find the value of x in each triangle.
A triangle has angles measuring 55 degrees, 45 degrees, and x.
A triangle has angles measuring 42 degrees, 74 degrees, and x.
A triangle has angles measuring 102 degrees, 38 degrees, and x.
For the first triangle, x = 80 degrees.
For the second triangle, x = 64 degrees.
For the third triangle, x = 40 degrees.