Answer:
109°
Explanation:
To figure this problem out, we should start with the rule that a pentagon's angles add up to 540°. The angles in the given pentagon are 121°, 102°, 108° and 100°. To find x, we need to make sure all 5 angles add up to 540.
121°+ 102°+108° +100°+x=540°
If you add those four given angles, you get 431°.
540° - 431° = 109°