1)Cho tam giác ABC vuông tại A ,AH là đường cao (H thuộc BC) . chứng minh : a)AB^2=BH.BC b)AH^2=BH.CH 2)cho tam giác ABC vuông tại A , AB=12cm; AC=16cm,AD là phân giác của góc A ( D thuộc BC) a) tính tỉ số diện tích của hai tam giác ABD và ACD b)tính độ dài cạnh BC c)tính độ dài các đoạn thẳng BD và CD d)tính chiều cao AH của tam giác

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VIẾT LẠI CÂU DZÙM MÌN ZỚI:)))) ***CONCESSION IN SPITE OF DESPITE Examples : For all my money, I feel very poor. In spite of all my money, I feel very poor. :::::::Exercise 8::::::::::::::: 1. Whatever you may promise, I don’t believe a word.  For all .............................................................. 2. In spite of his hard work, he hasn’t been promoted for five years.  For all .............................................................. 3. Whatever you may say about Mary, I will not change my opinion about her.  For all .............................................................. 4. Say what you will about her husband, I do not like him.  For all .............................................................. 5. For all the help of their friends, they were unable to cope with all the problems.  In spite .............................................................. ****CONCESSION EVEN IF EVEN THOUGH Note: Even if is sometimes followed by should or an emphatically stressed verb. Examples: Even if it costs a lot, I want to buy it. Even if it should cost a lot, I want to buy it. Even if it does cost a lot, I want to buy it. Even though it costs a lot, I want to buy it. :::::::Exercise 9::::::::::::: 1. I couldn’t love Betty less, even though she may have had another boyfriend.  I couldn’t love Betty less, even .............................................................. 2. It might be cold, but we’ll still go for a walk.  Even if .............................................................. 3. I’m not going to accept their offer, although they might give me a big salary.  Even if .............................................................. 4. She is beautiful and intelligent, but I’m not going to marry her.  Even though .............................................................. 5. She is beautiful and intelligent, but I’m not going to marry her.  I’m not going to marry her .............................................................. :::::::::::Another :::::::::::::: 1,I hate to have to tell you this, but you are wrong. I have to .........................................