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14 August 2024
19:12 | (Upload log) . . Vvsss (talk | contribs) uploaded File:Disphenoid -parallelepiped.png |
N 19:12 | Disphenoid (diff | hist) . . (+998) . . Vvsss (talk | contribs) (Created page with "Disphenoid is a tetrahedron whose four faces are congruent acute-angled triangles. ==Main== 390px|right a) A tetrahedron <math>ABCD</math> is...") |