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Reference.org
Triangular cupola
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<p>In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, the triangular cupola is the <a href="/facts/Cupola_(geometry)/BFcmxRQI">cupola</a> with <a href="/facts/Hexagon/DPzuCzWE">hexagon</a> as its base and <a href="/facts/Triangle/cRXUwsMn">triangle</a> as its top. If the edges are equal in length, the triangular cupola is the Johnson solid. It can be seen as half a <a href="/facts/Cuboctahedron/hD7p0Mem">cuboctahedron</a>. The triangular cupola can be applied to construct many polyhedrons. </p>