SOLUTION: A twelve sided polygon will contain how many straight angles in the sum of its interior angles?

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Question 1124580: A twelve sided polygon will contain how many straight angles in the sum of its interior angles?
Answer by MathLover1(20849) About Me  (Show Source):
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A n=12 sided polygon will contain 10 (recall %28n-2%29 part) straight angles in the sum of its interior angles.