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Mathematics, 28.01.2021 02:50 salllllllllll

In a trapezoid ABCD with legs AB and CD, the diagonals intersect each other at point O. Prove: OA⋅OB=OC⋅OD

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In a trapezoid ABCD with legs AB and CD, the diagonals intersect each other at point O. Prove: OA⋅OB...
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