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Which one of the following formulas will find the sum of interior angles of a polygon with n sides


180n-2

180n-360

180(n-1)

180n

Verified Answer :

MissPhiladelphia

Each time
we add a side (triangle to quadrilateral, quadrilateral to pentagon, etc), we add
another 180° to the total of the
interior angle.



Triangle,
sum interior angle is 180


Square,
is 360


Pentagon is
540



So the
formula is

180 ( n –
2 )

Answer:

A. 180n - 2

Not 180n-360

Not 180(n-1)

Not 180n

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