5 tetrahedron, cube, octahedron, dodecahedron, and Icosahedron
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Tetrahedron, Cube Octahedron Dodecahedron Icosahedron
Many things have 2 sides that are congruent, including isoceles triangles, any regular polygons or polyhedrons, rectangles, etc.
A regular triangle is called an equilateral triangle. A regular quadrilateral is called a square. Did that help??? cone, sphere, cube, polyhedrons
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No. Polyhedrons are any shape with multiple sides. A triangle and a prism are just two different kinds of polyhedrons.