We will work backwards to get the answer. First find each exterior angle of a regular hexagon

A hexagon has 6 sides (n=6) and the formula for each exterior angle of a regular polygon is

Secondly, find the interior angle of the regular *n*-sided polygon.

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Thirdly, find the number of sides of the *n*-sides polygon.

Use the formula that is use to find each interior angle of a regular polygon

You must remember to memorize the formulas for polygons i) Sum of Interior Angles of a Polygon (In your textbook) ii) Each Interior Angle of a Regular Polygon (Formula above) iii) Each Exterior Angle of a Regular Polygon (Formula above). These formulas are **NOT** given in the Exam formula sheet. If you don’t memorize, you will not be able to do these questions.

New Elementary Math (E-Math) and Additional Math Group Tuition Class near Admiralty MRT station.