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baongocta14206
2 năm trước
Vẽ một hệ trục tọa độ Oxy , đơn vị trên các trục là 1 cm. a, Vẽ ABC biết A(1;3);B( 2; 2);C(3; 2) . Tính diện tích tam giác ABC. b, Vẽ tam giác MNK biết M(0; 4); N( 5;0);K( 1; 1) . Tính diện tích tam giác MNK .
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