Make 3D Solid Shapes - Stellated Octangula / Звёздчатый октаэдр
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The stella octangula is a polyhedron compound composed of a tetrahedron and its dual (a second tetrahedron rotated 180 degrees with respect to the first).The stella octangula is also (incorrectly) called the stellated tetrahedron, and is the only stellation of the octahedron.
The name “stella octangula“ is due to Kepler (1611).
Звёздчатый октаэдр был открыт Леонардо да Винчи, затем спустя почти 100 лет переоткрыт Иоганном Кеплером, и назван им Stella octangula — звезда восьмиугольная.
У октаэдра есть только одна звёздчатая форма. Её можно рассматривать как соединение двух тетраэдров.
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