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Omni-MATH / Let ABCD be a tetrahedron such that its circumscribed sphere of radius R and its inscribed sphere of radius r are concentric. Given that AB=AC=1≤BC and R=4r, find BC². · Discussion

Discussing Let ABCD be a tetrahedron such that its circumscribed sphere of radius R and its inscribed sphere of radius r are concentric. Given that AB=AC=1≤BC and R=4r, find BC². · Omni-MATH

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