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gyroelongated square bipyramid : ウィキペディア英語版 | gyroelongated square bipyramid
In geometry, the gyroelongated square bipyramid or heccaidecadeltahedron is one of the Johnson solids (''J''17). As the name suggests, it can be constructed by gyroelongating an octahedron (square bipyramid) by inserting a square antiprism between its congruent halves. It is a deltahedron. The dual of the gyroelongated square bipyramid is a square truncated trapezohedron with 10 faces: 8 pentagons and 2 square. == See also ==
* Gyroelongated square pyramid
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