Question

what is the measure of the missing angle

Answer 1

Since the following question involves a parallelogram, a parallelogram=360°. Knowing this information, we can add all the known angles, subtract it from 360, and get your answer:

360-270=90

So 90° is your answer, or D

Answer 2

As you can see that it is a quadrilateral,

and as sum of all angles of a quadrilateral =360°

Therefore,

72°+91°+107°+x =360°
270+x =360°

x = 360°-270°
= 90°




Therefore,
x is equal to 90°, hence option D is correct.