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INTRODUCTION A polygon is called regular if it has equal sides and angles. Thus, a regular triangle is an equilateral triangle, and a regular quadrilateral is a square. A general problem since antiquity has been the problem of constructing a regular n-gon, for different n, with only ruler and compass. OBJECTIVES 1. Define polygon , regular and irregular polygon. 2. Find the sum of the measure of interior angles of a polygon 3. Find the sum of the measure of exterior angles of a polygon. SUBJECT MAPPING https://youtu.be/pZmLoDerqOA ASSIGNMENT https://docs.google.com/forms/d/e/1FAIpQLSdWEaG1iyIJJk2Gbj2KWsOzEYxBVsHDPy04IsfEsh055MktHA/viewform?usp=sf_link REFERENCES https://youtu.be/jS1W44Pl0ek . https://youtu.be/UN57vvrMrY4 . DOWNLOADS. https://www.mathworksheets4kids.com/polygon.php https://www.splashlearn.com/math-vocabulary/geometry/regular-polygon