Mathematics, 22.07.2021 14:00 courtlyn8
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
Answers: 2
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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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