1. Английский язык
  2. шбұрышында DE=EF=21 см.

шбұрышында DE=EF=21 см. DE қабырғасының орта перпендикуляры DF қабырғасын K нүктесінде қияды. DF қабырғасының ұзындығын анықтаңыз, егер EKF үшбұрышының периметрі 60 см-ге тең болса​

buchelnikova84 buchelnikova84    1   23.12.2020 20:47    28

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