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Mathematics, 25.07.2021 20:30 mercedesamatap21hx0

Cho tam giác ABC cân tại A. Gọi K, H, I lần lượt là trung điểm của AB, BC, AC; N là điểm đối xứng của H qua I. BN cắt HK tai E và cắt AC tại F a) Chứng minh tứ giác AKHI là hình thoi b) Chứng minh AN vuông góc với CN c) Cho biết BC = 8 cm và AH = 6 cm. Tính È

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Cho tam giác ABC cân tại A. Gọi K, H, I lần lượt là trung điểm của AB, BC, AC; N là điểm đối xứng củ...
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