Question 1 • (OC27) MATH COLL ALGEBRA-1200710-S1-Degele-VOL7006P
Substitute 1,260° for s in the formula: 1,260 = 180(n − 2). Divide both sides by 180 to get 7 = n − 2, so n = 9. The polygon has 9 sides, which is choice D.
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