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Khách vãng lai
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phung tuan anh phung tua...
1 tháng 4 2022 lúc 20:39

C

Tạ Tuấn Anh
1 tháng 4 2022 lúc 20:39

C

Chuu
1 tháng 4 2022 lúc 20:39

C

chu hiểu minh
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Lưu Võ Tâm Như
8 tháng 1 lúc 20:28

Đề sai rồi bạn xem lại nhé

Kimian Hajan Ruventaren
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Bà HOÀng Thả ThÍnh
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Dương Mạnh Quyết
21 tháng 12 2021 lúc 10:21

bài 2:

ta có: AB<AC<BC(Vì 3cm<4cm<5cm)

=> góc C>góc A> góc B (Các cạnh và góc đồi diện trong tam giác)

Bài 3:

*Xét tam giác ABC, có:

       góc A+góc B+góc c= 180 độ( tổng 3 góc 1 tam giác)

hay góc A+60 độ +40 độ=180độ

  => góc A= 180 độ-60 độ-40 độ.

  => góc A=80 độ

Ta có: góc A>góc B>góc C(vì 80 độ>60 độ>40 độ)

        => BC>AC>AB( Các cạnh và góc đối diện trong tam giác)

Khách vãng lai đã xóa
Lưu Nguyễn Hà An
15 tháng 2 2022 lúc 9:04

bài 2:

ta có: AB <AC <BC (Vì 3cm <4cm <5cm)

=> góc C>góc A> góc B (Các cạnh và góc đồi diện trong tam giác)

Bài 3:

*Xét tam giác ABC, có:

       góc A+góc B+góc c= 180 độ( tổng 3 góc 1 tam giác)

hay góc A+60 độ +40 độ=180độ

  => góc A= 180 độ-60 độ-40 độ.

  => góc A=80 độ

Ta có: góc A>góc B>góc C(vì 80 độ>60 độ>40 độ)

        => BC>AC>AB( Các cạnh và góc đối diện trong tam giác)

HT mik làm giống bạn Dương Mạnh Quyết

Trần Thị Thu Mến
31 tháng 10 lúc 18:47

ta có: AB<AC<BC(Vì 3cm<4cm<5cm)

 

=> góc C>góc A> góc B (Các cạnh và góc đồi diện trong tam giác)

 

Bài 3:

 

*Xét tam giác ABC, có:

 

       góc A+góc B+góc c= 180 độ( tổng 3 góc 1 tam giác)

 

hay góc A+60 độ +40 độ=180độ

 

  => góc A= 180 độ-60 độ-40 độ.

 

  => góc A=80 độ

 

Ta có: góc A>góc B>góc C(vì 80 độ>60 độ>40 độ)

 

        => BC>AC>AB( Các cạnh và góc đối diện trong tam giác)

dsfdsf
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Trịnh Việt Dũng
15 tháng 6 2022 lúc 20:31

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Đặng Thị Ngọc Ánh
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2K9-(✎﹏ ΔΠGΣLS ΩҒ DΣΔTH...
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Đỗ Vũ Nhật Anh
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Duy Nghĩa Hoàng
15 tháng 11 2021 lúc 21:58

Giống mình làm

 

Phạm Ngọc Thái Bảo
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Đặng Phương Thảo
15 tháng 7 2015 lúc 20:14

Ta có:  tam giác ABC=tam giác DEF (1)
và tam giác DEF = tam giác HIK       (2)
Từ (1) và (2) =>  tam giác ABC = tam giác HIK

IS
22 tháng 2 2020 lúc 19:57

Ta có:  tam giác ABC=tam giác DEF (1)
và tam giác DEF = tam giác HIK       (2)
Từ (1) và (2) =>  tam giác ABC = tam giác HIK

học tốt

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Nguyễn Hiền Lương
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Trần Quang Minh
12 tháng 10 2016 lúc 20:54

biết ABC = DEF, DEF=HIK => ABC=HIK

Trần Quang Minh
12 tháng 10 2016 lúc 20:52

Biết tam giác abc bằng tam giác DEF, tg DEF = tg HIK suy ra tam giác ABC = tam giác HIK

IS
22 tháng 2 2020 lúc 19:58

Ta có:  tam giác ABC=tam giác DEF (1)
và tam giác DEF = tam giác HIK       (2)
Từ (1) và (2) =>  tam giác ABC = tam giác HIK

học tốt

Khách vãng lai đã xóa