please help.

the question is, How many degrees in a triangle which is 180 degrees, quadrilateral 360 degrees ??
is that right.

and i need help on the
11- gon ?
20- gon?
and it says what is the formula??

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  1. triangles - 180 degrees, yes
    quadrilaterals - 360 degrees, yes

    11-sided figure:

    20-sided figure:

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    2. 👎
  2. The sum of the interior angles of a polygon is given by 180º(n-2) where n is the number of sides

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    2. 👎

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