Giúp em những câu này

C1: Góc nội tiếp chắn cung 80° có số đo là:

A. 40°

B. 80°

C. 100°

D. 160°

C2: Trong đuờng tròn (O), vẽ đường kính AB và bán kính OC vuông góc với nhau. Tính số đo góc CAB?

A. 30°

B. 75°

C. 60°

D. 45°

C3: Góc ở tâm chắn cũng 80° có số đo là:

A. 40°

B. 80°

C. 100°

D. 160°

C4: ABCDEFGH là bát giác đều nội tiếp đường tròn (O). Tính số đo cung lớn AB?

A. 250°

B. 300°

C. 270°

D. 315°

Xác định thành phần khởi ngữ trong câu sau: " Còn anh, anh đứng sững lại đó, nhìn theo con, nỗi đau đớn khiến mặt anh sầm lại trông thật đáng thương và hai tay buôn xuống như bị gãy. "

Xác định thành phần khởi ngữ trong câu: " Còn anh, anh đứng sững lại đó, nhìn theo con, nỗi đau đớn khiến mặt anh sầm lại trông thật đáng thương và hai tay buông xuống như bị gãy. "

\(3x+my=2 x-y=1\)

\(\left\{{}\begin{matrix}\\\end{matrix}\right.\)3x+my=2

x-y=1

Nháp, ko có làm

Rewrite these sentences as directed in the brackets.

1. I / wish / everybody / aware / importance / preserve / their culture. (Built a sentence)

=>

2. People claimed that Phong Nha is the biggest cave in Viet Nam. (Use impersonal passive)

=>

3. I / passed on / I / had heard / the town / from / and / the other / villages / also / the news / . / ( Arrange the set of words to make a complete sentence)

=>

4. have time / Nam / didn't / got up / for / late, / he / breakfast . / so / (Arrange the sets of words to make a complete sentence)

=>

5. has / since / He / the played / piano / 2015 / . ( Arrange the sets of words to make a complete sentence)

=>

I. Rewrite these sentences as directed in the brackets

1. I/wish/everybody/aware/importance/preserve/their culture. (Built a sentence)

=>

2. People claimed that Phong Nha is the biggest cave in Viet Nam. (Use impersonal passive)

=>

3. I/passed on/I/had heard/the town/from/and/the other/villages/also/the news/./ (Arrange the set of words to make a complete sentence)

=>

Rewrite these sentences as directed in the brackets.

1. I / wish / everybody / aware / importance / preserve / their culture. (Built a sentence)

=>

2. People claimed that Phong Nha is the biggest cave in Viet Nam. (Use impersonal passive)

=>

3. I / passed on / I / had heard / the town / from / and / the other / villages / also / the news / . / ( Arrange the set of words to make a complete sentence)

=>

4. have time / Nam / didn't / got up / for / late, / he / breakfast . / so / (Arrange the sets of words to make a complete sentence)

=>

5. has / since / He / the played / piano / 2015 / . ( Arrange the sets of words to make a complete sentence)

=>

Rewrite these sentences as directed in the brackets.

1. I / wish / everybody / aware / importance / preserve / their culture. (Built a sentence)

=>

2. People claimed that Phong Nha is the biggest cave in Viet Nam. (Use impersonal passive)

=>

3. I / passed on / I / had heard / the town / from / and / the other / villages / also / the news / . / ( Arrange the set of words to make a complete sentence)

=>

4. have time / Nam / didn't / got up / for / late, / he / breakfast . / so / (Arrange the sets of words to make a complete sentence)

=>

5. has / since / He / the played / piano / 2015 / . ( Arrange the sets of words to make a complete sentence)

=>

Rewrite these sentences as directed in the brackets.

1. I / wish / everybody / aware / importance / preserve / their culture. (Built a sentence)

=>

2. People claimed that Phong Nha is the biggest cave in Viet Nam. (Use impersonal passive)

=>

3. I / passed on / I / had heard / the town / from / and / the other / villages / also / the news / . / ( Arrange the set of words to make a complete sentence)

=>

4. have time / Nam / didn't / got up / for / late, / he / breakfast . / so / (Arrange the sets of words to make a complete sentence)

=>

5. has / since / He / the played / piano / 2015 / . ( Arrange the sets of words to make a complete sentence)

=>