Answer:
31.9
Step-by-step explanation:
cos(15°)× 33 = 31.87~ 31.9
c=28
In a convex polygon, all the exterior angles are congruent to each other.
I'll be choosing the two angle degrees of 4c-28 and 3c and set them equal to each other.
4c-28=3c
Therefore, c=28