Mathematics
Mathematics, 05.12.2021 04:30, hwhite41

Cho hình bình hành MNPQ. Gọi H và K lần lượt là hình chiếu của M và P. Trên QN: a, Chứng minh MHPK là hình bình hành.
b, Gọi I là trung điểm của MP. Chứng minh H, I,K thằng hàng.
c, MH cắt PQ tại E. KP cắt MN tại F. Chứng minh MP, EF, QN đồng quy.

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Cho hình bình hành MNPQ. Gọi H và K lần lượt là hình chiếu của M và P. Trên QN: a, Chứng minh MHPK...

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