Đáp án+Giải thích các bước giải:
Áp dụng định lý Py-ta-go vào tam giác ABC vuông tại A ta có:
AB² + AC² = BC²
⇔ 6² + AC² = 10²
⇔ 36 + AC² = 100
⇔ AC² = 64
⇔ AC = $\sqrt{64}$ = 8 (vì AC > 0)
Vậy AC = 8cm
⇒ Chọn B.8cm
Áp dụng định lí Pytago vào ΔABC vuông tại A, ta có:
$BC^{2}=$ $AB^{2}$ $+$ $AC^{2}$
$\Rightarrow$$AC^{2}=$ $BC^{2}$ $-$ $AB^{2}$
$\Rightarrow$$AC^{2}=$ $10^{2}$ $-$ $6^{2}$ $=100$ $-$ $36=$ $64$
$\Rightarrow$$AC^{}=$ $\sqrt[]{64}=8$
Câu 1: 8cm
II Rewrite sentences using relative clauses. 11. The teacher was late this morning. (The teacher is always on time.) 12. I went to see the doctor. (The doctor told me to rest for 2 weeks.) 13. It is the first man. (I have loved him very much.) 14. I often visit my friends in Hue city. (It is a beautiful city in Vietnam.) 15. I met a famous singer. (Her mother died last week.) 16. The new stadium will be opened next week. (It can hold 60,000 people. 17. Nam plays the piano well. (He is my brother.) 18. The woman is a famous professor. (I am talking to her.) 19. Yesterday I met Nga. (I haven't seen her for a long time.) 20. The shoes are too small for me. (My mother bought them last week.)
Cho đường tròn tâm o đường kính AB dây EK cắt AB và EK không đi qua O a,so sánh EK và AB b,so sánh EH và FK biết H là chân đường vuông góc của E
Giải giupa e với Ạ câc cao nhân
Reading 3: The Role of the Japanese Mother The focus of the mother is her home and family, with particular attention to the rearing of children. While most Japanese believe that a woman's place is in the home, women make up almost 40 percent of the labor force. More than half of these women are married. Many mothers with small children work only part-time so they can be home when their children are not in school. The extra income earned by the mother is often used to meet the cost of their children's education. Japanese mothers take the responsibility of their child's education and upbringing very seriously. They seldom confront their preschool children because they want to foster an intimate, dependent relationship. The purpose of this approach is to get the child to obey willingly with the mother’s wishes and to shape the child's behavior over a long period of time. The close nature of the mother-child relationship and the strong parental commitment help to provide a strong foundation for the child's entry into elementary school. Mothers are involved directly in with the child's school. Each day a notebook is sent back and forth between mother and teacher remarking on the child's mood, behavior, health, and activities both in school and at home. Mothers attend PTA meetings usually twice a month and are involved with school committee's working on special projects such as gardening and hot lunch preparation. School is a very stressful and competitive process so the Japanese mother concentrates all her efforts on getting her children through so they can get accepted into the appropriate universities. Read the passage, and then decide whether the statements are true (T), false (F) or not given (NG). T F NG 1. Most Japanese women are housewives. T F NG 2. Taking care of children and bringing them up are of great importance to Japanese mothers. T F NG 3. Japanese mothers tend to be very strict to their children at home. T F NG 4. Japanese mothers and teachers work together for the children's study progress and comfort at school. T F NG 5. The Japanese mother concentrates all her efforts on getting her children through, so the atmosphere at home is very stressful. GẠCH DẪN CHỨNG TỪNG CÂU GIÚP MINK NHA MN
Tìm các quan hệ từ trong truyện sau : Gia đình kiến rất đông. Kiến Mẹ có những chín nghìn bảy trăm con. Tối nào kiến mẹ cũng tất bật trong phòng ngủ của đàn con . Kiến Mẹ phải về và thơm yêu từng đứa con : – Chúc con ngủ ngon ! Mẹ yêu con Cứ như vậy cho đến lúc mặt trời mọc, lũ kiến con vẫn chưa được mẹ hôn hết lượt. Điều đó làm Kiến Mẹ không yên lòng, và thế là suốt đêm Kiến Mẹ không không hề chợp mắt để hôn hết đàn con.
giúp mình với nha mình đang cần gấp lắm a
Tìm x,y,x biết a,x/y=9/7,y/z=7/3 và x-y+z=(-15) b,x/y=7/20;y/z=5/8 và 2x+5y-2z=100
Ơ kìa.... Sao sống bẩn thế bạn Vẽ đậu mầm tức giận
Biến đổi giúp mình thành câu khẳng định . Phủ định . Và nghi vấn
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