Cho góc xOy = 45 độ. Trên tia Ox lấy điểm A sao cho Oa= 4cm. Trên tia Oy lấy điểm B và C sao cho OB= 5 cm và BC= 3cm. Nối AB,AC.

a, Có mấy tam giác được tạo thành. Gọi tên các tam giác đó.

b, Hãy vẽ và đặt tên cho các góc kề bù với góc AOB. Tính số đo các góc đó.

c, Tính OC

1, Phân tích biện pháp tu từ trong mỗi đoạn thơ sau:

a, Người Cha mái tóc bạc

Đốt lửa cho anh nằm

Rồi bác đi dém chăn

Từng người từng người một

Sợ cháu mình giật thột

Bác nhón chân nhẹ nhàng

b, Chú bé loắt choắt

Cái xắc xinh xinh

Cái chân thoan thoắt

Cái đầu nghênh nghênh

Ca lô đội lệch

Mồm hút sáo vang

Như con chim chích

Nhảy trên đường vàng

!. Tìm x \(\in\) Z để các phân số sau tối giản.

a, \(\dfrac{x-8}{2x-17}\)

b, \(\dfrac{x-4}{x+1}\)

c, \(\dfrac{10}{x+7}\)

d, \(\dfrac{x-1}{x^2}\)

2. Tìm x \(\in\) Z để một phân số sau nhận giá trị là 1 số tự nhiên.

a, \(\dfrac{2.6}{x+3}\)

b, \(\dfrac{x+6}{x+1}\)

c, \(\dfrac{x-2}{x+3}\)

d, \(\dfrac{2x+1}{x-3}\)

1. Tìm x, biết:

a, \(1\dfrac{3}{5}\) + \(\dfrac{\dfrac{2}{7}+\dfrac{2}{17}+\dfrac{2}{37}}{\dfrac{5}{7}+\dfrac{5}{17}+\dfrac{5}{37}}\) . x = \(\dfrac{16}{5}\)

b, (\(\dfrac{1}{24.25}\) + \(\dfrac{1}{25.26}\) + . . . + \(\dfrac{1}{39.40}\) ) . 120 + x. \(\dfrac{1}{3}\) = -4

c, \(\left|x-\dfrac{1}{3}\right|\) . 2 + \(\dfrac{4}{5}\) = 0,24

d, \(\dfrac{24}{7x-3}\) = \(\dfrac{-4}{25}\)

e, ( 50% x + \(5\dfrac{1}{4}\) ) , \(\dfrac{-2}{3}\) = \(2\dfrac{5}{6}\)

f, \(1\dfrac{1}{3}\) - 25%\(\dfrac{-5}{12}\) + 2x = 1,6 : \(\dfrac{3}{5}\)

I, Tìm xy, bt

a, xy-3x-y=0

CHUYỂN CÁC CÂU SAU SANG CÂU BỊ ĐỘNG.

1. People balive that 13 is an unlucky number.

2.They know that English is an international language.

3. I have heard her sing this song several times.

4. People saw him steal your car.

5. They say that John is the brightest student in class.

6. Open your book.

7. She asvised me to sell that house.

8. It is dangerous for us to take the short cut.

9. They think that he has died a natural death....

10. He won't let you do that silly thing again.

11. He orders us to clean the floor.

12. You must see it to belive it.

13. People belive that the earth stood still.

14.People son't make the children work hard.

15. Don't do that silly thing again.

16. They begged us to help him.

CHUYỂN CÁC CÂU SAU SANG CÂU BỊ ĐỘNG.

1. They told me that you were the best architect in this cty.

2. She reported that hte flowers were killed by frost.

3. Some people inform me that the direator is going to take a business trip to England

4.That officer announced that the meeting was delayed until next week.

5. He discovered that this cotton was grown in Egypt.

6.They promise that the performance will strar on time.

7.The director notifies all the worked that they will havr to work extra hard this month.

8. We belived that Alice would pass the driving test.

9. He rocommends that we should stay at the city xenter.

10.They have persuaded me that they will go with me to the stadium.

11. They have decided that the company will go to the beach together at the week.

12.people think that Maradona is the best football player in the 20th cuntury.

13.They find that the job is not suitable. for a girl like her.

14. The teacher explained that this powerful enaine pulled the train.

15. He told me that his football team had played well last season.