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From Karnataka Open Educational Resources
→Concept #2. Properties of polygons
===Learning objectives===
===Learning objectives===
# The sum of the interior angle measures of an n-sided, convex polygon is <math>(n-2).180</math>
# The sum of the interior angle measures of an n-sided, convex polygon is <math>(n-2).180</math>
# A regular polygon has all sides and angles equal.
# All exterior angles of a polygon add upto 360 degrees.
# Each exterior angle must be <math>360/n</math>
# Each of the exterior angle and interior angles are measured from the same line. hence they add upto 180 degrees.
