Mathematics, 23.07.2021 23:00 cynayapartlow88

Cho tam giác ABC vuông tại B, có AB =5cm, BC=12cm .Trên tia đối của BA lấy điểm D sao cho BA=BD, trên cạnh BC lấy điểm E sao cho BE=4cm. a) Tính độ dài cạnh BC b) Chứng minh tam giác EAD cân c) Tia AE cắt DC tại K . Chứng minh K là trung điểm của DC d) Chứng minh AD<4EK

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Cho tam giác ABC vuông tại B, có AB =5cm, BC=12cm .Trên tia đối của BA lấy điểm D sao cho BA=BD, trê...

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