Cho tam giác ABC có độ dài 3 cạnh là AB = c, BC = a, AC = b và thỏa mãn a^2 + b^2 > 5c^2. Chứng minh góc C < 60 độ

viết lại câu sao cho nghĩa không đổi

1,she draws so beautifully ?
How...
2, there isn't anything in the box
there is..........
3, look at my album
have.......
4, Does Miss Loan libe alone ?
Does.....lk about t
5, the building is 49 storeys high
it 's ............
6, we 'll talk about the plan tomorrow
we 'll have.......
7, Yesterday i rode on a horse
yesterday i had............

chuyen sang loi noi gian tiep nhung cau ke

1,They said, wwe are living in this house now
2, All the students will have a meeting neext weeek , Thu said
3, all home wwork must be done at home , the teacher said
4, You can go to the movies wwith your ffirend , her father zaid to her

chuyển sang lời nói gián tiếp những câu kể sau ( phần 2)

8, you have to take at least two botttles of water for the trip . Nam 's father said.
9, She said to me , '' I want to speak to your father
10, He said , i shall answer the phone
11, she said , he 's done hí homework well
12, Lan ;s mother said , '' you must go to bed early''8, you have to take at least two botttles of water for the trip . Nam 's father said.

chuyển sang lời nói gián tiếp những câu kể sau ( phần 1 nha cả nhà , còn p2)
1, Nam said to Loan , "I'll take you to my house ''
2, Hoa said , " I caught sight of Nam this morning"
3, I often go to school be fore 7 o;clock
--> Nam said.......................................
4, My parents are very proud of my good marks , Phong said
5, I can swim across the river . Tam said
6, I may visit my parents this sumer , Hoa said
7, My brother doesn't like eating sticky rice , said Mai

viết câu hoàn chỉnh sử dụng thì hiện tại hoàn thành của động từ
1, He/ have / a cold / we /a week
2, they / buy / the new house / April
3, my family / be / here / Christmas
4, we/ not see / each other / ten year
5, i / not eat / in that restaurant / ages
6, i write/ this leter / six o'clock