Mathematics, 12.07.2021 14:00, randallmatthew6124

Cho tam giác ABC, vẽ ra phía ngoài ∆ABC các hình vuông ABDE và ACFK. chứng minh rằng:
a) EKvuông góc với trung tuyến AM của ∆ABC và EK = 2AM
b) nếu I là đỉnh thứ tư của hình bình hành EAKI thì I thuộc đường cao AH của ∆ABC
c) CD = BIvà CD ⊥ BI;BF= CI và CF ⊥ CI.
d) CD, BF, AH đồng quy

Answers: 3

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Cho tam giác ABC, vẽ ra phía ngoài ∆ABC các hình vuông ABDE và ACFK. chứng minh rằng:
a) EKvu...