Hendecagon or undecagon
regular hendecagon has internal angles of 147.27 degrees. The area of a regular hendecagon with side length a is given byA regular hendecagon is not constructible with compass and straightedge; this animation shows an approximation:
A shape with 11 sides and angles is called an 11-gon, or a hendecagon.
Heptagon, octagon, nonagon, decagon, hendecagon, and dodecagon. There are many more.
Anything from none, 2 to 11 sides; and none, 2 to 11 angles. And, the number of equal sides may or may not be the same as the number of equal angles.
They have none
A hendecagon (also undecagon) is a polygon with eleven edges and eleven angles.
The sum of the interior angles of a hendecagon is 1620 degrees.
A hendecagon is a regular 11-sided polygon, the angles of which are all 147.27(recurring) degrees. With 11 sides there will be 11 angles, so 147.27 * 11 = 1620 degrees.
Hendecagon or undecagon
Total of interior angles is 22 - 4 right angles so hendecagon angles would be 18 x 90/11 ie 147.27 degrees.
regular hendecagon has internal angles of 147.27 degrees. The area of a regular hendecagon with side length a is given byA regular hendecagon is not constructible with compass and straightedge; this animation shows an approximation:
Hendecagon
hendecagon
Presumably the question concerns a hendecagon. The sum of the interior angles of a n-gon are (n-2)*180 degrees. For a hendecagon, the sum of the interior angles would be 9*180 = 1620 degrees. If the hendecagon is regular, then all its interior angles are equal, and each is then 1620/11 = 147.2727.. degrees.
Hendecagon
A shape with 11 sides and angles is called an 11-gon, or a hendecagon.