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Part of 1963 Miklós Schweitzer

Problems(1)

Miklos Schweitzer 1963_1

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9/19/2008
Show that the perimeter of an arbitrary planar section of a tetrahedron is less than the perimeter of one of the faces of the tetrahedron. [Gy. Hajos]
geometryperimeter3D geometrytetrahedronadvanced fieldsadvanced fields unsolved