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Mathematics 8 Online
OpenStudy (thegenius):

Find the sum of the interior angles of a nonagon?

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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