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There is no such word as a dectagon. And since it could refer to an octagon or a decagon (or possibly something else), it is not possible to give a sensible answer. Please correct your spelling and resubmit the question.
Assuming that the question is meant to be about some polygon, it need not have any lines of symmetry.
What else can I help you with?
How many lines of symmetry does a nephroid have?
A nephroid has 2 lines of symmetry.
How many lines of symmetry do oblongs have?
It has 2 lines of symmetry.
How many lines of symmetry has the number 4?
no lines of symmetry
How many lines of symmetry in pentgon drawing of lines of symmetry?
5 lines
How many lines of symmetry in a parrallelogram?
There are 0 lines of symmetry in a parallelogram.
How many lines of symmetry does a nephroid have?
A nephroid has 2 lines of symmetry.
How many lines of symmetry does a four point star have?
it has five lines of symmetry
How many lines of symmetry on a decagon?
10 lines of symmetry
How many lines of symmetry does a trapezuim have?
4 Lines of symmetry
How many lines of symmetry does H have?
2 lines OF SYMMETRY
How many lines of symmetry does a tetrahedon have?
2 lines of symmetry
How many lines of symmetry do oblongs have?
It has 2 lines of symmetry.
How many lines of symmetry has the number 4?
no lines of symmetry
How many lines of symmetry does phi have?
2 lines of symmetry
How many lines of symmetry in pentgon drawing of lines of symmetry?
5 lines
What are the eight lines of symmetry?
There is no such thing as 8 lines of symmetry. A circle, for example, has infinitely many lines of symmetry.
How many lines of symmetry?
There are infinitely many lines of symmetry. Every line can be a line of symmetry for a suitable shape.
