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The equation to find the size of the interior angle of an n sided shape is (n-2)180/n
For a 120 sided shape, you need to plug n=120 into this equation.
(120-2)180/120
=118x180/120
=177
Thus a 120 sided shape does have an angle of 177 degrees, and the statement in the question is true.
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Earn +20 ptsQ: Does a 120 sided shape have an interior angle of 177 degrees?
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