Investigate a "dodecahedron"
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A 12 sided 3D shape is called a dodecahedron.
10 sided shape: Decagon
A shape with 12 sides is known as a Dodecagon.
The equation for and interior angle of an n sided shape is (n-2)180/n In this case we have a 12 sided shape. Plugging n=12 into the equation gives us: (12-2)180/12 = 10x180/12 = 150 Thus an interior angle of a 12 sided shape would be 150 degrees.
A 12 sided shape is called a dodecagon.