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If the size of an interior angle in a regular polygon is 140 degrees, how many sides does the polygon have
[From: ][author: ][Date: 11-05-18][Hit: ]
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Exterior angle must be 40 if interior is 140
360 / number of sides = 40
360 = 40x
9 = x so Nine sides
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140n=180(n-2)
360=40n
n=9 sides
1
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