A PPT file support the discovery of interior angle properties of polygon. This is a follow on lesson based around a table with the number of side, number of triangles and interior angle sum columns.
A number of tasks at the end extend the ideas beyond the previous lesson.
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A nice resource with some very good exam style questions at the end. Powerpoint examines the interior angle sum of various polygons and the information is presented in a clear and concise way.
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