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Lenhuy
2 năm trước
cho tam giác abc vuông tại c. gọi m là trung điểm ab. vẽ me vuông góc ac tại e, mf vuông góc bc tại f. a) CM: tứ giác cfme là hình chữ nhật và cm = ef b) CM: E là trung điểm AC c) Gọi D là điểm đối xứng với M qua AC. CM: tứ giác CMAD là hình thoi d) Gọi O là giao điểm của CM và EF. CM: 3 điểm B,O,D thẳng hàng giúp mik vs mik tick cho mai mik kt rồi
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