Answer:
x = 109
Step-by-step explanation:
The formula for sum of angle in a polygon = (n - 2) * 180 where n is the number of sides of the polygon
The figure in the image is a pentagon meaning a polygon with five sides and as such n = 5
plugging n=5 in the above equation, we get the sum of angles in a polygon is;
(5-2)*180 = 3*180 = 540
=> x + 121 + 108 + 102 + 100 = 540
x = 540 - 121 - 108 - 102 - 100
x = 109
