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18 gon is 18 sided figure. Internal angles of 18 sided figure is (2 x 18 - 4) right angles = 32 x 90 Find_the_measure_of_one_interior_angle_of_a_regular_decagon, hence one angle is (32 x 90)/18 = 32 x 5 = 160 degrees

Find_the_measure_of_one_interior_angle_of_a_regular_decagon

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