Angle x° and angle
154° are supplementary angles, meaning that they equal 180° when added.
Forty three million, eighty thousand seven hundred
As we can notice the shape is a Pentagon. A Pentagon's angles should add up to 540. So we can use simple addition and subtraction to solve.
121 + 108 + 102 + 100 = 431
540 - 431 = 109
109 should be your answer