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Nguyễn Hải Linh
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Nguyễn Hải Linh
11 tháng 2 2016 lúc 20:55

Bạn nào đó giải hộ mik điii

Mik đang bí bài này T^T

Minh Pham
3 tháng 1 2021 lúc 19:12

cặc

Học Tập
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phạm thị kim yến
5 tháng 7 2017 lúc 8:25

A B C D E F

A B C D E

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Thành Nhân Võ
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Thành Nhân Võ
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Thành Nhân Võ
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Đợi anh khô nước mắt
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Nguyễn Hải Linh
11 tháng 2 2016 lúc 20:57

Câu này mik hỏi bn mà đúng hơm?? =))

Đợi anh khô nước mắt
11 tháng 2 2016 lúc 21:15

uk làm biếng làm nên.........

Slime
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Nguyễn Lê Phước Thịnh
27 tháng 7 2023 lúc 14:03

a: góc FEB+góc FBE=45+45=90 độ

=>EF vuông góc BC

b: ΔDFC vuông tại F có góc C=45 độ

nên ΔDFC vuông cân tại F

=>FD=FC

c: Xét ΔBEC có

EF,CA là đường cao

EF cắt CA tại D

=>D là trực tâm

=>BD vuông góc CE

Duy Nam
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NGUYỄN tHỊ Linh
24 tháng 2 2019 lúc 13:39

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nhok ngáo ngơ - 2k8 ( th...
1 tháng 3 2019 lúc 22:02

xin lỗi mk ko bt giải vì chưa ok 

ai như vậy thì k mk nha