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September 23, 2014

September 23, 2014

Posted by **sharon** on Saturday, January 7, 2012 at 8:19pm.

- geometry -
**drwls**, Saturday, January 7, 2012 at 11:46pmThe sum of all internal angles of a pentagon is 540 degrees.

For a polygon of N sides, the sum is

N*(180-360/N) = N*180 - 360 degrees

Subtract (120 +93 +108 +101) from 540 for your answer.

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