A three dimensional solid figure looks like a cube or a prism. Pyramids are three dimensional solid figures as well.
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There are lots of 3 dimensional shapes, like spheres, cubes, rectangular prisms, triangular prisms, pyramids, tetrahedrons, the list could go on forever.
Well, honey, Cubes and Spheres are called solid figures because they have three dimensions: length, width, and height. Unlike those flat, two-dimensional shapes, these bad boys have depth, making them solid. So, next time you see a Cube or Sphere, just remember they ain't no flimsy paper cutouts - they're the real deal.
You can actually learn to make an origami one. But its a 12 sided figure with each face having 5 sides in my past experience. A dodecagon is a 12-sided polygon, a 2-dimensional figure. The dodecahedron is a 12-sided polyhedron, a 3-dimensional object of 12 pentagonal faces and 20 vertices. The dodecahedron is also one of the Platonic solids. * * * * * The above is a totally confused answer. It conflates a a dodecagon and a dodecahedron. The first, which the question is about, is a plane (2-D) figure which is bounded by 12 straight lines. The second, which has nothing to do with the question, is a solid (3-D) shape enclosed by 12 pentagonal faces.
12 x 10 x 10 look like the measurements of a three dimensional object and would represent the volume of the object. Volumes are measured in cubic feet and CANNOT be converted to square feet.
Measure...is the length twice the width or 3 times. If so, then just multiply that amount, then figure like normal.