none
2l + 2w or length+width
An eleven sided shape is called a hendecagon.
it is the amount of squares.
The name of an eleven sided geometric shape is a Hendecagon or endecagon.
a heptagon is a shape with 11 sides!
If I have deciphered your spelling correctly, a perimeter is the total distance around a 2-dimensional figure. A polygon is a particular type of 2 dimensional shape.
It is a hendecagon.
1100100100110010010100100111010100101001001010100100110
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hendecagon
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hendecagon