Question 2 (i)
Find the measure of each exterior angle of a regular polygon of:
(i) 9 sides
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Solution
(i) Sum of angles of a regular polygon =(n−2)×180∘ =(9−2)×180∘=7×180∘=1260∘
Each interior angle =SumofinterioranglesNumberofsides=1260∘9=140∘
Each exterior angle =180∘−140∘=40∘