plz help you have to find the angle marked x in each of these polygons

The angle of the first diagram is 299°, and the angle of the second diagram is 77°.
The region of a polygon is the area occupied by way of a polygon. Polygons may be regular and abnormal. The primary polygons which might be used in geometry are triangle, rectangular, rectangle, pentagon, hexagon, and so on. some of these polygons have their personal vicinity.
The fundamental formula for the place of an everyday pentagon is, place of pentagon = 1/2 × p × a; in which 'p' is the perimeter of the pentagon and 'a' is the apothem of a pentagon.
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