Question #efe67

1 Answer
Jim G.
Aug 16, 2017

#10#

Explanation:

#"using the following steps"#

#• " subtract the interior angle from "180^@#

#["interior angle + exterior angle "=180^@]#

#rArr180-144=36^@larrcolor(red)" exterior angle"#

#• " divide "360^@" by this difference"#

#["sum of exterior angles "=360^@]#

#rArr"number of sides "=360/36=10#

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