Bài 17. Cho tam giác ABC (AB=AC) có góc ở đỉnh bằng 200; cạnh đáy là a ; cạnh bên là b . Chứng minh rằng a3 + b3 = 3ab2

The water company will have to ________water supplies while repairs to the pipes are carried out. * a. cut off b. take off c. break off d. set off

Các bạn giúp mk câu 1 được ko ạ Mk đã làm câu a rùi nhé Minh cám ơn nhó 👉👈

vẽ cho tui chibi mèo cute nha, có màu,kí tên

“________” “That sounds like fun.” * a. What about dinner tonight? b. Thank you for that amazing dinner, c. Would you mind cooking dinner? d. Please cook dinner tonight.

the most beautiful park is opposite my house. It has a lot of trees. câu này là The most beautiful park which has a lot of trees is opposite my house hay là the most beautiful park which is opposite my house has a lot of trees.

Chứng minh a+b+c $\geq$ 3 ∛abc với a>0,b>0,c>0

Mình cần gấp lắm ạ Read the text below. Use the word given in capitals at the end of some of the lines to form a word that fits in the gap in the same line. THE OLDEST HOUSE IN BRITAIN It was warm, round, had a (FANTASY) ........................................ view of a lake and appears to have been occupied for several hundred years. Welcome to the oldest house in the UK, which was found with other fascinating relics (NEAR) ........................................ at a site in North Yorkshire. These remains are transforming our (KNOW) ........................................ of how Britain’s earliest inhabitants lived. The structure was 3.5 meters in (WIDE) ........................................ and was supported by a circle of wooden posts. Dark, decayed matter at the center of the ruin suggests the possibility of a roof entirely made of grasses. (INVESTIGATE) .................................... of the remains by scientists revealed that the building stood in 8,500 BC. It was (ORIGIN) ........................................ thought that people living in Britain at this time were nomadic with no fixed homes. But the (DISCOVER) ........................................ of the oldest known house provides clear (EVIDENT) ........................................ that some of these people built large permanent structures. Researchers of the site, however, are (SURE) .................................. about how long the house will remain the ‘oldest’ in the UK, because new finds are being made all the time.

WHO________ World Health Organization. * a. shortens to b. summarizes in c. symbolizes on d. stands for

cho hình thang abcd . đáy ab =2/5 dc .hai đường chéo cắt nhau tại e . so sánh diện tích tam giác abe và diện tích tam giác dec