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The sum of the measures of seven interior angles of an octagon is 1000. What is the measure of the eighth interior angle?

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OHMYJOSHIN

Answer:

Sum of all interior angles of an octagon = (n - 2) x 180° = (8 - 2) x 180° = 1080°

Let x be the measure of the 8th interior angle.

x + 1000° = 1080°

x = 1080° - 1000°

x = 80°

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