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koolmodee
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How many symmetries (and what symmetries) and how many elements do the transformation groups of the equilateral triangle and the icosahedron have?
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A symmetry is a transformation that preserves the shape and size of an object. In other words, an object is symmetric if it looks the same before and after the transformation.
Transformation groups are sets of symmetries that can be applied to an object. These groups can include rotations, reflections, translations, and combinations of these transformations.
An equilateral triangle has six symmetries: three rotations (of 120, 240, and 360 degrees) and three reflections (over its three sides).
An icosahedron is a three-dimensional geometric shape with 20 faces, each of which is an equilateral triangle. It is one of the five Platonic solids.
An icosahedron has 120 symmetries, including rotations, reflections, and combinations of these transformations.