Angle Calculation Result
The image shows two straight lines that are designated as line m and line n, and there is an angle of 140° formed between these lines. Since the lines m and n are given to be parallel (as indicated by m || n), the angle corresponding to the given 140° angle on the parallel line below must be the same, due to the concept of alternate interior angles between parallel lines.
So, the value of x is the same as the given angle because it is an alternate interior angle to the 140° angle.
Therefore, the value of x is 140°.