Question

Find the value of x.
143
2x° 152
116°
to
1259
140°
139°

Answer 1

Answer:85 degrees

Explanation:

Formula for sum of interior angles is (n-2)180. Since there are 7 sides, n-2 is 5.

5 x 180 = 900

Add all the angles given and subtract sum from 900 and you are left with 85 for the missing angle.