Every polygon has the same number of angles as it has sides.
In the case of the hendecagon, that's eleven.
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.
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.
The sum of the interior angles of a hendecagon is 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.
A shape with 11 sides and angles is called an 11-gon, or a hendecagon.
Hendecagon