A pentagon the Measures of four of its angle are shown bellow: what is the value of x?

See below.

Step-by-step explanation:

The sum of the measures of the interior angles of an n-sided polygon is

(n - 2) 180

A pentagon has 5 sides, so for a pentagon, n = 5.

(n - 2) 180 = (5 - 2) 180 = 3 (180) = 540

The sum of the measures of the angles of a pentagon is 540.

You don't show the measures of the 4 angles that are known, so to answer the question, add the 4 given measures and subtract the sum from 540.