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Dragan Panjkov · Answer 1 · 2024-11-02T08:19:41+0000

Explanation:

The interior angles of a n-gon sum to ( n-2) * 180

so for this 4-gon

All of the angles have to sum to 360

17x+8 + 66 + 110 + 74 = 360

17x + 258 = 360

x = 6