A Dodecahedron has twelve pentagonal faces. A Dodecagon is a plane figure with twelve sides.
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A 12 sided figure is called a dodecagon. This type of polygon has 12 angles and each angle equals 150 degrees.
The name of a four sided figure (or shape) is called a Square. :)
a 12 gon is a 12 sided figure
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Heptagon - a seven sided two demensional figure