Mathematics
Mathematics, 23.11.2021 15:00, mosthatedpicky1

Cho tam giác ABC có AB = AC. Gọi H là trung điểm của cạnh BC. a) CMR: AH là tia phân giác của BAC và góc B = góc C.
b) CMR: AH vuông góc với BC.
c) Trên tia đối của tia HA lấy điểm K sao cho HK = HA. CMR: CK //AB.

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Cho tam giác ABC có AB = AC. Gọi H là trung điểm của cạnh BC. a) CMR: AH là tia phân giác của BAC...

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