Mathematics, 26.09.2021 01:10 broyochey1

Cho đường tròn(O) có AB là đường kính. Dây CD cắt đường kính AB tại I. Gọi H và K theo thứ tự là chân đường vuông góc kẻ từ A và B đến CD. Chứng minh: CH=DK

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Cho đường tròn(O) có AB là đường kính. Dây CD cắt đường kính AB tại I. Gọi H và K theo thứ tự là châ...

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