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Additionally, use- (n - 2)180 for finding the measure of the interior angle of a regular polygon with sides. Explore more types of problems in the next section. 1) A pentagonal sticky note whose side is 4 cm 2) The lid of a hexagonal biscuit container whose side measures 6 cm 3) The hexagonal tables in the science laboratory whose side measures 10 dm 4) A heptagon of side 5 cm 5) An octagonal mirror whose side is 8 in