perplexus.info :: Geometry : Perpendicular edge of tetrahedron

Perpendicular edge of tetrahedron (Posted on 2021-02-02)

Let ABCD be a tetrahedron with ∠BAD = 60, ∠BAC = 40, ∠ABD = 80, ∠ABC = 70. Prove that the lines AB and CD are perpendicular.

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Comment 3 of 3 |

Posted by Sumit Mishra on 2021-02-04 12:33:22

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