# SOLUTION: How many degrees are in a 20 sided figure?? would u take 180x180 20 times or what do I do?? I need some help on my math.' Thank you :) From Rosie Jenkins.

Algebra ->  Algebra  -> Polygons -> SOLUTION: How many degrees are in a 20 sided figure?? would u take 180x180 20 times or what do I do?? I need some help on my math.' Thank you :) From Rosie Jenkins.       Log On

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 Geometry: Polygons Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Polygons Question 603667: How many degrees are in a 20 sided figure?? would u take 180x180 20 times or what do I do?? I need some help on my math.' Thank you :) From Rosie Jenkins. Found 2 solutions by Alan3354, stanbon:Answer by Alan3354(31538)   (Show Source): You can put this solution on YOUR website!How many degrees are in a 20 sided figure?? -------- The sum of interior angles is 180*(n-2) = 180*18 = 3240 degs Answer by stanbon(57984)   (Show Source): You can put this solution on YOUR website!sum of the interior angles of an n-sided convex polygon is (n-2)180 degrees --- Your problem: sum of interior angles = (20-2)*180 = 18*180 = 3240 degrees ================== Try it with a smaller number of sides to see how it works. 3 sides: (3-2)180 = 180 ; that is a triangle 4 sides: (4-2)180 = 360 ; that could be a square 5 sides: (5-2)180 = 540 ; that could be a pentagon etc. =================== Cheers, Stan H.