Which value of n makes the following equation true?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Math each whole number with a rational,exponential expression

Given that abcd is a rhombus, what is the value of x?