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Nguyentthihuyentrang
2 năm trước
Cho tam giác ABC. Hãy vẽ và ghi công thức theo định nghĩa ảnh của tam giác qua các phép vị tự sau: a) V(O;2) ( điểm O nằm ngoài tam giác ABC ) b) V(O;-2) c) V(M;1/2)(M là trung điểm của BC) d) V(M;-1/2) e) V(A;2) f) V(G;-3)(G là trọng tâm của tam giác)
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