Question

Find the value of x.

Answer 1

57 degrees

Step-by-step explanation

Answer 2

x = 57

Explanation:

So we know all triangles add up to 180 degrees. And that supplementary angles add up to 180 degrees.

So, we can do that missing angle + 138 = 180

180 - 138 = 42

180 - 42 - 81 = x = 57