Cho tam giác ABC. M,N lần lượt là trung điểm của AB,AC

a. Chứng minh:  Diện tích tam giác ACM = Diện tích tam giác BCN

b. Cho Diện tích tam giác AMN = 10 cm^2 . Tính Diện tích tam giác ABC

23. The film won an award for its (photograph) ………………..   24. These young people will have (determine) ……………………….. to overcome the difficulties when they start work.   25. We took the (scene) ………………..……….. route home. 26. Charles is much more (emotion) ………………….. than he appears.   27. I tried talking to her but she wasn’t very (communicate) …………………   28. She is very (energy) ……………………- always running around, seeing people, doing lots of sport.   29. It’s a well-known (character) …………………. of chameleons that they can change their color.   30. FIFA is an immensely (power) …………………. organization .   25. We took the (scene) ………………..……….. route home. 26. Charles is much more (emotion) ………………….. than he appears.   27. I tried talking to her but she wasn’t very (communicate) …………………   28. She is very (energy) ……………………- always running around, seeing people, doing lots of sport.   29. It’s a well-known (character) …………………. of chameleons that they can change their color.   30. FIFA is an immensely (power) …………………. organization 22. He expressed strong opposition to the plan. 23. The film won an award for its (photograph) ………………..   24. These young people will have (determine) ……………………….. to overcome the difficulties when they start work.   25. We took the (scene) ………………..……….. route home. 26. Charles is much more (emotion) ………………….. than he appears.   27. I tried talking to her but she wasn’t very (communicate) …………………   28. She is very (energy) ……………………- always running around, seeing people, doing lots of sport.   29. It’s a well-known (character) …………………. of chameleons that they can change their color.   30. FIFA is an immensely (power) …………………. organization