Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6


Những câu hỏi liên quan
DA
Xem chi tiết
DH
15 tháng 11 2021 lúc 21:58

Giống mình làm

 

Bình luận (0)
MN
Xem chi tiết
YN
12 tháng 5 2021 lúc 13:00

* Theo mình thì phần a) Góc A = 90 độ sẽ hợp lý hơn chứ. Vậy nên mình sẽ làm theo cả hai góc A 90 độ và 80 độ nhé ( Nhưng bài của mình phần b) sẽ theo góc A = 90 độ )

a)

Góc A = 80 độ thì sẽ có thể tam giác ABC là tam giác cân, tam giác ⊥ tại B hoặc C, tam giác ABC là tam giác tù hoặc tam giác nhọn

Góc A = 90 độ thì tam giác ABC là tam giác vuông tại A

b) 

Theo phần a), ta có: Tam giác ABC cân tại A

=> Góc B = góc C = ( 180 độ - 70 độ ) : 2 = 55 độ

Bình luận (0)
 Khách vãng lai đã xóa
TH
Xem chi tiết
H24
Xem chi tiết
TD
15 tháng 6 2022 lúc 20:31

https://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.html

Bình luận (0)
DT
Xem chi tiết
YH
9 tháng 11 2017 lúc 19:31

3)- theo bài tao có :A+B+C=180 độ.(định lí tổng ba góc của 1 tam giác)

C:B:A=1:3:6 => C/1=B/3=A/6=(A+B+C)/(1+3+6)=180/10=18

Do đó :C/1=18              B/3=18                 A/6=18

       =>C=18 độ        =>B=54 độ          =>A=104 độ

Bình luận (0)
LD
15 tháng 11 2021 lúc 14:35

????????????????????????????????????????????????????????????
 

Bình luận (0)
 Khách vãng lai đã xóa
GD
Xem chi tiết
TN
10 tháng 3 2023 lúc 17:25

`Delta ABC` có : `hat(A)+hat(B)+hat(C)=180^0` ( đ/lý )

hay `60^0+79^0+hat(C)=180^0`

`=>hat(C)=180^0-60^0-79^0=41^0`

Bình luận (0)
H24
10 tháng 3 2023 lúc 17:26

\(a,\) Xét \(\Delta ABC\) có :

\(\widehat{A}+\widehat{B}+\widehat{C}=180^o\)

\(\Rightarrow60^o+79^o+\widehat{C}=180^o\)

\(\Rightarrow\widehat{C}=41^o\)

\(b,\) Tam giác ABC là tam giác thường

Bình luận (0)
H24
Xem chi tiết
NT
23 tháng 12 2021 lúc 13:14

a: Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:

\(\dfrac{a}{1}=\dfrac{b}{3}=\dfrac{c}{5}=\dfrac{a+b+c}{1+3+5}=\dfrac{180}{9}=20\)

Do đó: a=20; b=60; c=100

Vậy: ΔABC là tam giác tù

Bình luận (0)
SN
Xem chi tiết
BT
Xem chi tiết
DQ
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)

Bình luận (0)
 Khách vãng lai đã xóa
LA
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

Bình luận (0)
TM
31 tháng 10 2024 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)

Bình luận (0)
DC
Xem chi tiết