-Định nghĩa: Tam giác cân là tam giác có hai cạnh bằng nhau.

-Tính chất:Trong tam giác cân, hai góc ở đáy bằng nhau.

-Dấu hiệu nhận biết:

+ Nếu một tam giác có hai cạnh bằng nhau thì tam giác đó là tam giác cân.

+ Nếu một tam giác có hai góc bằng nhau thì tam giác đó là tam giác cân.

tam giác cân ⇌ tam giác cân

ez

✔

có khó đâu

80÷10=8 lít

13-10=3 máy

8×3=24 lít

80+24= 104 lít

Giải:

Mỗi máy tiêu thụ số xăng là: 80 : 10 = 8(l)

13 máy tiêu thụ số xăng là: 8 x 13 = 104(l)

Kết luận:..

ừ

Em cần hỏi gì em hỉ?

• Phép lặp từ: Từ "Thỏ" được lặp lại ở đầu hai câu văn. 
• Phép nối: Dấu chấm câu nối hai câu văn có nội dung liên tiếp nhau, miêu tả hành động của Thỏ. 

Ta có: \(\frac{3x-2y}{4}=\frac{4y-3z}{2}=\frac{2z-4x}{3}\)

=>\(\frac{12x-8y}{16}=\frac{8y-6z}{4}=\frac{6z-12x}{9}\)

Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:
\(\frac{12x-8y}{16}=\frac{8y-6z}{4}=\frac{6z-12x}{9}=\frac{12x-8y+8y-6z+6z-12x}{16+4+9}=0\)

=>12x=8y=6z

=>6x=4y=3z

=>\(\frac{6x}{12}=\frac{4y}{12}=\frac{3z}{12}\)

=>\(\frac{x}{2}=\frac{y}{3}=\frac{z}{4}\)

mà x-2y+3z=8

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

\(\frac{x}{2}=\frac{y}{3}=\frac{z}{4}=\frac{x-2y+3z}{2-2\cdot3+3\cdot4}=\frac{8}{2-6+12}=\frac88=1\)

=>x=2; y=3; z=4

x-y+z=2-3+4=6-3=3

forsaken

My favourite means of transport is bike. A bike is small, light, and very convenient. I often use it to go to school or for a short trip with my friends. The best thing about a bike is that it’s eco-friendly. It doesn’t use any fuel, so it helps reduce air pollution and protect the environment. I really like riding my bike because it keeps me healthy and helps me save time. I don’t have to wait for the bus or worry about traffic. Most importantly, riding my bike makes me feel free and relaxed.

Topic 1: My favourite transport is the motorbike. It is fast and convenient for navigating through city traffic. I use it daily to go to work and visit friends. The feeling of freedom when riding is amazing. It is also relatively cheap to run and easy to park. I highly recommend it for urban living.

Topic 2: Hi [Friend's Name], How are you? There's a new action movie called 'The Chase' out this weekend. It looks great! Want to go watch it together on Saturday evening at 7 PM at the Mega Cinema? Let me know if you can make it. Hope to see you soon, [Your Name]

Topic 3: I would love to join the Holi festival in India. It's known as the 'Festival of Colors'. People throw colored powders and water at each other, dance, and celebrate the arrival of spring. The atmosphere looks incredibly joyful and vibrant. It seems like a unique and unforgettable experience to participate in such a lively celebration. 

1. I didn’t play video games last night because I was tired.

2. She should practice speaking English with her friends every day.

1. I did not play video games last night because I was tired.

2. She should practice speaking English with her friends every day.

1. In spite of hating horror movies, my sister watched one with her friends.

2.You shouldn’t throw rubbish on the street.

3. Linda is interested in watching science shows.

1. In spite of hating horror movies, my sister watched one with her friends.

2. You shouldn't throw rubbish on the street.

3. Linda is interested in watching science shows.