the sum of all the interior angles of a regular polygon is 1080° how many sides does the polygon have what is the measure of each interior angles and each exterior angle
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side=2n-4×90= 1080
2n-4=12
2n=16
n=8
exterior angle=360÷8=45
interior angle=180-45°=135°
2n-4=12
2n=16
n=8
exterior angle=360÷8=45
interior angle=180-45°=135°
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