3 years ago

How many sides does a polygon have if the sum of its interior angles is 1,260º?

1 answer:

3 0

The sum of interior angle is = 180(n-2) where n denotes the number of sides
so 1260° =180(n-2), n -2= 1,280/180=7, so n=7+2=9
the answer is <span>C. 9

</span>

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