dakodahepps
07.08.2021 •
Mathematics
Cho hình lăng trụ tam giác đều ABC.A’B’C’ có chiều cao bằng a và 2 đường thẳng AB’, BC’ vuông góc với nhau. Tính thể tích khối lăng trụ và diện tích xung quanh của nó.
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Ответ:
Diện tích đáy: S = (a^2) . (√3)/4
Diện tích xung quanh của lăng trụ tam giác đều = Tổng diện tích các mặt bên = (Chu vi đáy) x (Chiều cao) : S = 3.a.h
Ответ:
13 14 15 16 17 18 19 20
Step-by-step explanation: