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Home > GC > Chapter 8 > Lesson 8.1.5 > Problem 8-55A

8-55A.

Review the Math Notes box in Lesson 8.1.4 for help determining the sum of the interior angles of a polygon.

x = 60°

x = 82°

10x + (8x − 16) + (12x − 8) + ... = ?

How is ∠x and the missing angle in the shape related?
What relationship do they have?