Proteins are built as chains of amino acids, which then fold into unique three-dimensional shapes. Bonding within protein molecules helps stabilize their structure, and the final folded forms of proteins are well-adapted for their functions.
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A two-dimensional shape with three sides is a triangle. A three-dimensional shape with three faces is a cylinder.
A sphere is indeed a three dimensional shape. It is a circle rotated about an axis several times to create and three dimmensional object from a two dimensional shape.
Anything that you can pick up is a three dimensional shape. They are shapes that have a length, breadth and height.
It is a sphere
A polygon is a two-dimensional shape. A cube has three dimensions, and is thus not a polygon.A three-dimensional solid shape (such as a cube) is called a polyhedron.