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from | Encarta |  |
Symmetry |
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| The property of symmetry describes certain physical phenomena, geometric shapes, and mathematical equations that remain unchanged despite changes in orientation or other properties. This illustration shows three geometric shapes and indicates the manner in which they are symmetrical. The top two figures remain unchanged as they revolve around a central point, while the lower triangle can rotate 180 degrees about a central line without changing. | ||||||
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| Symmetry | ||||||
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