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Toán 12: Trong mặt phẳng với hệ tọa độ Oxyz, tam giác ABC với A(1;3;7), B(2;5;-2), C(a;1;b)
9 months ago
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Toán 12: Trong mặt phẳng với hệ tọa độ Oxyz, tam giác ABC với A(1;3;7), B(2;5;-2), C(a;1;b) nhận điểm G(3;c;3) làm trọng tâm của nó
a) Nếu M là trung điểm đoạn thẳng BC thì tọa độ điểm là M(4;3;1)
b) a+b=c = -2
c) Nếu CM = xCA + yCM thì x+y =3
d) Với D(5;-1;13) thì ABCD là hình bình hành
#HinhHocKhongGian
#HinhHocKhongGianOxyz
#ToanLop12
#CachGiai
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