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1- Let ABCD be a tetrahedron such that the edges AB, AC and AD are mutually perpendicular let area of triangles ABC,ACD and ADB

1- Let ABCD be a tetrahedron such that the edges AB, AC and AD are mutually perpendicular let area of triangles ABC,ACD and ADB be 8, 9 and 6 square units respectively. find the area of triangle BCD.

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