user-avatar
thaipham097675
2 năm trước
cho hình thang ABCD có 2 đáy là AB và CD (đáy lớn CD dài gấp 2 lần đáy bé AB).Hai đường chéo AC và BD cắt nhau tại O. a) Hãy so sánh diện tích của hai tam giác ABC và BCD. b)Hãy chứng tỏ diện tích của tam giác AOD bằng diện tích tam giác BOC
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Choose A, B, C or D to indicate the correct answer to each of the following questions. 1. My sister sometimes helps ______ to do the housework A. me B. mine C. my D. mines 2. A good daughter is ready to share things with ______ mother. A. she B. her C. hers D. she’s 3. I usually go out with ______ friends or family on Sundays. A. mine B. me C. mines D. my 4. Some of the students in my class go to the laboratory where ______ learn chemistry and physics. A. them B. it C. they D. its 5. Mai: What is ______ favorite subject? Lan: My favorite subject is Math. A. you B. your C. yours D. you’re 6. Miss Hoa teaches English in my class. She is ______ English teacher. A. we B. our C. us D. ours 7. ______ notebook is on the table. A. I B. My C. Me D. Mine 8. They told me they would come so let’s wait for ______. A. they B. them C. their D. themselves 9. What do ______ often do after school? A. your B. yourself C. you D. yours 10. A bad friend can lie to ______. A. your B. yourself C. you D. yours 11. Can you give ______ the pen? A. mine B. myself C. mines D. me 12. That’s ______ brother. A. my B. mine C. me D. mines 13. I like fish because ______ is delicious. A. it B. its C. itself D. it’s 14. Let’s collect and give warm clothes to poor children in ______ city. A. us B. our C. ours D. ourselves 15. My brother and ______ share a bedroom. A. me B. I C. my D. mine 16. Can you tell ______ how to cook the soup? A. mine B. myself C. my D. me 17. What is ______ nationality? A. he B. his C. him D. himself 18. What language does ______ speak? A. her B. hers C. herself D. she 19. My father is angry with ______. A. I B. mine C. me D. myself 20. I ______ want to be the tallest student in my class. A. me B. myself C. mine D. my 21. She looks at ______ in the mirror. A. she’s B. she C. herself D. hers 22. He can walk to school by ______. A. him B. his C. he D. himself 23. We must continue ______ journey although there are many troubles. A. our B. us C. we D. ours 24. Your sisters can take care of ______ when you are not at home. A. them B. their C. themselves D. they 25. You should live for______, not for your parents. A. yours B. yourself C. your D. you’re

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team