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Mathematics, 24.01.2020 21:31 jentho2012
Abcd равнобедренная трапеция . диагональ ac является биссектрисой угла a. докажите , что ab=bc=cd
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Abcd равнобедренная трапеция . диагональ ac является биссектрисой угла a. докажите , что ab=bc=cd...
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