1. A

2. C

Gỉa sử cây mọc vuông góc với mặt đất là Tam giác vuông ABC và chiều dài cái cây là cạnh AB; chiều dài cái bóng là AC; khoảng cách từ đỉnh cây xong đỉnh bóng cây là cạnh BC 

Áp dụng định lí PY-ta-go trong tam giác vuông ABC ta có

\(BC^2=AB^2+AC^2\)

\(BC^2=4^2+3^2\)

\(BC^2=16+9\)

\(BC^2=25\Rightarrow BC=\sqrt{25}=5\left(m\right)\)

Vậy khoảng từ đỉnh cây xuống đỉnh cái bóng là 5m

mình xin lỗi do mình lúc đó bận xong mình quên mất tiêu

1.Because kevin has failed many times , so he disappointed

2.I was very hungry because i hadn't eaten for 24 hours

3.Because the fruits were ripe . he ate all the fruits

4.He didn;t go to sleep because he hadn't finhished the letter

5.He is dismissed because he was late for work very often

6.He caused a serious accident because he drove so fast

7.Because the streets are narrow , so there aren't many people driving car in this city

8.I couldn't do the test because it was so diffcult

9.Because i don't know russian , i have to have my document translater into russian

10.The children had an accident because they went to school late

1. I went home early because I was feeling unwell

3. I coulden't get to seep because of the noise

4. he only accepted the job because of the salary , which was very high

5. sarah can't climb up the tree because of her fear of heights

6. Because of his age , john was not hired although he had the necessary qualifications

7. Sandy didn’t go to school yesterday because she was sick.

8. She went to bed early because her tiredness.

Mắt mẹ em to tròn, đen láy như hai viên bi đen.

không thẳng hàng

A nha bạn