Question 580179
I know that the equation to find the sum of the measures of the angles for  a regular polygon is
(180)N-360 when N=Number of sides. But I do not understand why.

Why do you multiply N by 180 then subtract 360.
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It's the same as 180*(n-2) = sum of angles
= 180*n - 360
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If n = 3, 540 - 360 = 180 for a triangle.
If n = 4, 720 - 360 = 360 for a rectangle.
Don't argue with what works.
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The why is harder to explain.
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I can do it on paper and scan it.
The other tutor didn't explain why there are 180 degs in a triangle.