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Mathematics, 16.01.2021 17:10 natalymorales96

Fie ABCDEF o prismă triunghiulară regulată, cu AB = 18 cm și AD = 9 cm. Calculați măsura unghiului format de planele (DBC) și (ABC). Repede!!
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Fie ABCDEF o prismă triunghiulară regulată, cu AB = 18 cm și AD = 9 cm. Calculați măsura unghiului f...
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