9514 1404 393
Answer:
C. x = 100°
Step-by-step explanation:
The sum of angles in a quadrilateral is 360°. The figures are given as congruent (even though they don't look like it), so corresponding angles have the same measure.
80° +75° +x +105° = 360°
x = 100° . . . . . . subtract 260°
