You can put this solution on YOUR website! How do I find a missing angle in a heptagon? I am given angles 142 130 122 105 and 110
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The sum of the interior angles of an n-gon is (n-2)180
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You've listed 5 angles so I guess you are looking for the 6th.
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(6-2)180 = 4*180 = 720
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720-(142+130+122+105+110) = your answer
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Cheers,
Stan H.
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