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nguyenlananh0701
2 năm trước
Dạng: Bất đẳng thức trong tam giác Cho tam giác ABC nhọn,đường cao AM, BN ,CP cắt nhau tại H. Chứng minh : a) HA+HB+HC <AB+AC . b) HA+HB+HC <2/3(AB+AC+BC) .
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EXERCISE 1. Rewrite these sentences 1. Fewer people came to the party than he anticipated. There weren’t....................................................... 2. Sheila usually behaves dreadfully, but she didn’t this time. Sheila didn’t................................................. 3. I see less of her than I used to. I don’t see......................................................... 4. We enjoyed the evening more than the children. The children................................................ 5. Is this the best price you can offer? Can’t you................................................. 6. This is the best party I’ve ever been to. I’ve........................................................... 7. I thought this meal would cost more than it did. This meal................................................. 8. If you walk slowly, it takes longer to get there. The more.................................................. 9. This is the most delicious cake I’ve ever tasted. ⇒ I’ve....... 10. I’ve never met any more dependable person than George. ⇒ George is....... 11. There isn’t anybody as kind-hearted as your mother. ⇒ Your mother is....... 12. There is no better teacher in this school than Mr John. ⇒ Mr John is....... 13. Have you got any bigger than that one? ⇒ Is this.......?

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