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.
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A right hendecagon can have no parallel sides because there are eleven sides to a hendecagon. It is not a requirement that there be any pairs of parallel sides in an irregular hendecagon, although there could be one or more pairs.
Heptagon, octagon, nonagon, decagon, hendecagon, and dodecagon. There are many more.
Oh, dude, a hendecagon has 11 sides, so it's got 11 interior angles. It's like simple math, you know? Each interior angle in a hendecagon measures 147.27 degrees, but who's really counting, right? Math is fun... or something.
2 equal sides and 2 equal angles.
There are 4 equal sides but it has no right angles