Ngày mai mình thi

tớ thi lâu rồi

Bài 1.Cho hình vẽ, biết a//b.

C cắt a tại A sao cho ˆcAa=40ocAa^=40o

A cắt b tại B, sao cho ˆKBb′=35oKBb′^=35o

c cắt d tại K.

Bài 2. Cho hình vẽ.Tính góc  ˆAKBAKB^.

Biết  ˆA=140oA^=140o

ˆB=70oB^=70o

ˆC=150oC^=150o.

Chứng minh rằng Ax//Cy.

Bài 3. Cho đường thẳng AB lấy điểm O nằm ngoài đường thẳng AB. Qua O vẽ đường thẳng c vuông góc với AB và đường thẳng d song song với AB.

a)Đường thẳng d có vuông góc với đường thẳng c không? Vì sao?

Bài 4. Cho hình vẽ, biết a//b và ˆC1−ˆD1=30oC1^−D1^=30o. b) Lấy M thuộc đường thẳng c (M khác O), vẽ đường thẳng x qua M và x vuông góc với đường thẳng c. Chứng tỏ x//d.

Tính ˆC2C2^ và ˆD2D2^.

Lời giải chi tiết

Bài 1. Ta có ˆA1=ˆcAa=40oA1^=cAa^=40o (đối đỉnh)

Lại có a // b ⇒Kt//b⇒Kt//b(hai đường thẳng phân biệt cùng song song với đường thứ ba thì chúng song song vói nhau), hai góc ˆtKBtKB^ và ˆKBb′KBb′^ ở vị trí so le trong. Kẻ qua K tia Kt // a, ta có ⇒Kt//b⇒Kt//b ˆAKt=ˆA1=40oAKt^=A1^=40o (cặp góc so le trong).

⇒ˆtKB=ˆKBb′=35o.⇒tKB^=KBb′^=35o.

 ta có ˆAKB=ˆAKt+ˆtKBAKB^=AKt^+tKB^

=40o+35o=75o.=40o+35o=75o.

Bài 2. Kẻ qua B tia Bt // Ax (1), ta có ˆxAB+ˆABt=180oxAB^+ABt^=180o(cặp góc trong cùng phía)

⇒ˆABt=180o−ˆxAB⇒ABt^=180o−xAB^

=180o−140o=40o.=180o−140o=40o.

Mặt khác, vì Bt nằm giữa hai tia BA và BC nên ta có ˆABt+ˆtBC=ˆABCABt^+tBC^=ABC^

⇒ˆtBC=70o−40o=30o⇒tBC^=70o−40o=30o

Hai góc ˆtBCtBC^ và ˆBCyBCy^ ở vị trí trong cùng phía,

Mà ⇒ˆtBC+ˆBCy=30o+150o=180o⇒tBC^+BCy^=30o+150o=180o. Do đó Bt // Cy (2).

Từ (1) và (2) ⇒⇒ Ax // Cy.

b) {x⊥cc⊥d⇒x//d{x⊥cc⊥d⇒x//d (hai đường thẳng phân biệt cùng vuông góc với đường thứ ba thì chúng song song với nhau).

Bài 3.

a){c⊥ABd//AB⇒d⊥c{c⊥ABd//AB⇒d⊥c (nếu một đường thẳng vuông góc với một trong hai đường thẳng song song thì nó cũng vuông góc với đường thẳng kia).

Bài 4. Ta có a//b, ˆD2=ˆC1=105oD2^=C1^=105o ˆC1C1^ và ˆD1D1^ là hai góc trong cùng phía nên

⇒ˆC1+ˆD1=180o⇒C1^+D1^=180o, lại có ˆC1−ˆD1=105oC1^−D1^=105o

⇒2ˆC1=210o⇒ˆC1=105o⇒2C1^=210o⇒C1^=105o

ˆC2=180o−ˆC1C2^=180o−C1^(cặp góc kề bù)=180o−105o=75o=180o−105o=75o

ˆD2=ˆC1=105oD2^=C1^=105o(cặp góc so le trong).

 

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Đề kiểm tra 45 phút (1 tiết) – Chương 1 – Đề số 2 – Đại số và giải tích 11

PHÒNG GD&ĐT
VĨNH TƯỜNG

ĐỀ KIỂM TRA HỌC KỲ I NĂM HỌC 2017-2018
Môn: Tiếng Anh - Lớp 7
Thời gian làm bài: 45 phút (Không kể thời gian giao đề)


A. LISTENING. Listen and fill in each blank with one suitable word to complete the following sentences.
a) The 9.25 flight to (1) ____________ is delayed by (2) ____________ hours
b) Passengers going (3) ____________ should go to boarding gate (4)_________________.
c) Passengers going Athens should go to boarding gate (5)_________________.
d) The flight number of the plane going to Amsterdam is (6)_________________.
e) The time in New York is (7) ______________ .
f) The temperature in (8) ________________ is 760F
B. PHONETICS. Choose the word whose underlined part is pronounced differently from that of the others by write the corresponding letter A or B, C, D.
9. A. delicious B. special C. musical D. physician
10. A. celebration B. collection C. education D. question
11. A. excited B. interested C. worried D. painted
C. VOCABULARY, GRAMMAR. Choose the best answer among A, B, C or D.
12. My tooth doesn’t stop hurting. I’ll go and see the .
A. singer B. teacher C. dentist D. actor
13. Could you tell me how to to the post office?- Oh, it is the left, bookstore and movie theater.
A. reach, on, at B. go, on, in C. reach, on, in D. go, on, between
14. noodles last night?
A. Did you eat B. Were you eat C. Did you ate D. Do you ate
15. It took us an hour to Nha Trang last year.
A. drive B. driving C. to drive D. drove
16. On the table were vegetables, bread and two large .
A. bowl of soup B. bowl of soups C. bowls of soups D. bowls of soup
17. My brother never goes to school late and
A. so do I. B. Neither don’t I. C. I don’t, either D. I don’t, too
18. What a ________________ house!
A. beauty B. beautiful C. beautify D. beautifully
19. I’ve never read a _______ novel than this one.
A. longest B. longer C. most longest D. more longer
20. Mary likes attending the English ____________ contests
A. speaking B. spoken C. speak D. speech
D. READING.
I. Read the passage about Charlie Chaplin and answer the questions
Charlie Chaplin was an English actor, director, producer, and composer. He is known as the most creative person of the silent –film era. Charlie Chaplin’s portrait of the tramp won the hearts of people all over the world.
Chaplin was born in London the 16th of April, 1889.He spent his childhood in poverty and hardship. In 1910 he began to perform pantomime in the United States. He first appeared on screen in 1914. He created his world -famous character, the Tramp, and he played this classic role in more than 70 films during his career. He also composed background music for most of his films. In 1972 Chaplin received an Honorary Academy Award for the “ the incalculable effect he has had in making motion pictures the art form of this century . Chaplin died on the 25th of December, 1977, at his home in Switzerland
21. What did Charlie Chaplin work as?
A. An English actor and director B. An English actor and producer
C. An English actor, director, composer and producer
22. When was he born?
A. April 6th 1889 B. April 16th 1889 C. April 16th 1988
23. When did he start appearing in films?
A. In 1910 B. In 1914 C. In 1972
24. Charlie Chaplin is very famous for __________.
A. his stage performance B. his background music C. his character “the Tramp”
25. Which of the following is NOT true?
A. Charlie Chaplin was an English artist. B. He played classical music.
C. He received an award in 1972.
II. Read, then choose the best answer

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