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3 sides: triangle

4 sides: quadrilateral

5 sides:pentagon

6 sides:hexagon

7 sides: heptagom

8 sides: octagon

9 sides: nonagon

10 sides: decagon

11 sides: unodecagon ?

12 sides: duodecagon

13 sides: trisca-decagon?

14 sides: ( I am tired on making up names- try quator-decagon, or look it up.)

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16y ago

What else can I help you with?