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OpenStudy (thegenius):
Find the sum of the interior angles of a nonagon?
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OpenStudy (thegenius):
What angles are adjecent angles
zepdrix (zepdrix):
Remember how to find the sum of the interior angles of a polygon? Hmm a triangle has 180 degrees interior. A square has 360 degrees. So we have 180 for 3 sides, 360 for 4 sided object, and so on... We can write this as \(\Large\bf\sf 180(n-2)\). 180 degrees for each side, minus the first 2 sides. Do you know how many sides a nonagon has?
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