SOLUTION: if I have a seven sided i guess you would call it irregular and it wants you to find X and the interior angles are marked as the following 1=125deg ,2=135deg,3=130deg,4=129deg,5=11

Question 1054371: if I have a seven sided i guess you would call it irregular and it wants you to find X and the interior angles are marked as the following 1=125deg ,2=135deg,3=130deg,4=129deg,5=116deg,6=120deg 7=x___deg
i used the numbers 1-7 to just number the interior angles

Answer by ikleyn(52855) (Show Source): You can put this solution on YOUR website!
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Use the fact that the sum of interior angles of the 7-gon is equal to (7-2)*180 = 5*180 = 900 degrees.

Therefore, to find the unknown 7-th angle, distract the sum of the given six angles from 900 degrees.

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