MathDB
Tetrahedron and equality of segments

Source:

October 30, 2005
geometry3D geometrytetrahedrongeometry unsolved

Problem Statement

ABCDABCD is a tetrahedron with ∠BAC=∠ACD\angle BAC = \angle ACD and ∠ABD=∠BDC\angle ABD = \angle BDC. Show that AB=CDAB = CD.
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