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một hình tam giác có đáy BC dài 34 m nếu bớt đáy BC đi một đoạn CD dài 5 m thì diện tích giảm đi 70 m tính diện tích tam giác ABC
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Các câu hỏi liên quan

I. Choose the word which has the underlined part pronounced differently. 1. A. small B. game C. ball D. call 2. A. eat B. read C. breakfast D. teacher 3. A. hour B. house C. here D. help 4. A. big B. city C. morning D. time II. Choose the most suitable word or phrase. 1. Children enjoy ___________ cartoons on television. A. watch B. watching C. watches D. watched 2. He eats a lot of fruits ___________ vegetables. A. and B. but C. or D. so 3. This book is different __________ that book. A. on B. at C. for D. from 4. We like playing the guitar and our father ___________. A. do too B. too C. does too D. does either 5. Son Tung MTP is my favourite singer. He __________ very well. A. draws B. sings C. takes D. makes 6. Last week, my classmates __________ new books and clothes for children in flooded areas in some central provinces. A. donate B. donates C. donating D. donated 7. Did you buy __________ bottle of cooking oil yesterday? A. some B. any C. a D. an 8. ___________ tables are there in the living room? A. How many B. How long C. How much D. How often III. Odd one out 1. A. envelope B. stamp C.letter D. coach 2. A. friend B. uncle C. father D. sister 3. A. room B. picture C. house D. apartment 4. A. songbooks B. guitar C. equation D. music

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