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Abcd ab cd - PowerPoint PPT Presentation

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409 views • 25 slides
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???????? 2. ??????? ??. ????. ?????? ABCD?AC?BD ???? O, ? OA=OC,OB=OD, ???? ABCD ?__________,??? ____ _____________________ ___________. ?????. ???????????????????. ????. ?????? ABCD ?? AB//CD, ? AB=CD, ???? ABCD ?___________,???___________________________ _

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519 views • 20 slides
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358 views • 18 slides
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372 views • 18 slides
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359 views • 17 slides
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295 views • 17 slides
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?????????(2). ??. A. D. B. C. ????. E. ? ??????????? ???? ????????. F. ? ????? ???? ??????. ???? ABCD ? ,AD?BC ? AB=CD ??B=?C ?? A=?D. ? ???????????. ???? ABCD ? ,AD?BC ? AB=CD ?AC=BD. ????????????? ?? ?????????????????? ???????? ????? ??????? ??. A. A. D. B. C. B. C.

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507 views • 16 slides

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