Sum of Interior Angles of Any Polygon

Showing a generalized way to find the sum of the interior angles of any polygon

[alexidk]

Oh my gosh! 4*180= 720. Not 640. Where did that even come from???

[angleturner]

loooonnnnggg to explain such a simple concept.

[droitwichkeystage]

I was trying to sell this to the Maths department until I saw the mistake 4*180 = 720 - have a look at your multiplication vids

[angleturner]

one is that one, and that one is that one, and 4 times 180 is 640 degrees.

[maddoxrine]

4*180= 720. Not 640. Where did that even come from???

[ben]

180(s - 2) = sum of interior angles where s = sides of the polygon.

[jffry]

4 * 180 != 640... it's 720 sal..

[demhustler]

he must have accident thought it was 160 * 4 = 640

[Buoy]

@jffry102 unless you're in base 10.626185

[jffry]

@NewgroundsOwnSBB Which I'm going to assume he's not.

[angleturner]

Why not just keep it simple and show how any polygon can be divided into (n-2) triangles, so it will be (n-2) x 180 degrees ? And it would be a 1 minute video, instead of an excruciatingly painful and ultimately boring 10 minutes.