Wikipedia tells me that the 11-gon was found to be neusis constructible in 2014, and the link given doesn't seem to be a crank, but the actual method is behind a paywall. (Interestingly, the page itself states positively that the 41-gon and 61-gon are not …

Question 285106: find the sum of the interior angles of an 11-gon. does it matter if it is a regular or not? Answer by richwmiller(17219) ( Show Source ): You can put this solution on YOUR website!

You can put this solution on YOUR website! (11-2)180=1620 Formula is N (number of sides) - 2 (TIMES) 180 as in a square or rectangle--the sum of the measure of the interior angles

multiply that by 11 and you have the area of the hendecagon. the area of the hendecagon is equal to 11 * 1.915699072 which is equal to 1.07268979 square meters. fyi, hendecagon is also called undecagon. the names are inter-changeable. here's a nice little calculator that does all the calculations for you.

So for an 11-sided regular polygon, the sum is: (11-2)*180=1620 degrees The polygon is regular, so you can just divide by 11 to get the measure of each angle:

You can put this solution on YOUR website! The sum of all the exterior angles in any polygon is 360 degrees. For an 11-gon, these 360 degrees are divided evenly into 11 angles, so the measure of each exterior angle is 360/11 = 32.7272..., roughly 33 degr

Draw a line from the center to each vertex: We will calculate the area of the isosceles triangle I have made red at the bottom of the polygon, then multiply that area by 11. The vertex angle of that triangle is or ° To find the base angles we subtract from 180° and divide by 2: 180° - = = and half of that is , the measure of each of the base ...

Jul 31, 2016 · In "Angle Trisection, the Heptagon, and the Triskaidecagon", published in the American Mathematical Monthly in March 1988, Andrew Gleason discusses what regular polygons can be constructed with com...

WHAT IS THE INTERIOR ANGLE MEASURE DEGREE IN A 11-GON -----The sum of the interior angles of an 11-gon is (11-2)*180 = 1620 degrees-----Each of the interior angles is 9*180/11 = 1620/11 = 147.2727... degrees-----Cheers, Stan H.

An 11-gon with complex numbers. Ask Question Asked 9 years, 7 months ago. Modified 9 years, 7 months ago.