Cho 20 diem trong do khong co 3 diem nao cung nam tren 1 duong thang hoi co the ve duoc bao nhieu hinh tam giac 3 trong 20 diem da cho lam dinh
de down bai o violympic ve may de lam thi phai lam the nao cac ban giup minh voi
cac ban oi lam the nao de co the thay doi truong day
lam the nao de co diem xuat sac
chu tho ton cat cac tam ton hinh chu nhat co kich thuoc 2,4m x 0,9m thanh cac manh ton hinh chu nhat co kich thuoc 0,6m x 0,3m de go thanh cac hop dung phu tung xe may.
a. Em chi giup chu cach cat nhu the nao de tiet kiem nhat nhe . (ko phai bo di mien ton nho nao )
b. Neu moi hop can 5 manh ton thi can cat bao nhieu tam ton de go 120 hop dung phu tung ?
Ban nao lam duoc minh tick cho
1 mieng bia hinh vuong co chu vi 40 dm. thu cat ra lam 2 manh va ghep lai duoc 1 mieng bia hinh tam giac. a) tinh dien tich mieng bia hinh tam giac do. b) thu do thai tu mieng bia lon ban dau gap va cat ra mot mieng bia hinh vuong nho co dien tich bang 1/10 dien tich mieng bia hinh vuong lon. thai loay hoay chua biet cat the nao? em co giup thai duoc khong? ve hinh minh hoa?
cho minh hoi de may vi tinh vieu co dau thi lam the nao
.co 4kg gao va 1 can 2 dia ko co qua can .lam the nao de lay ra 1kg gao?
cho mot khu vuc co dang hinh thang ( kich thuoc nhu hinh ve ben ) day be bang 3/5 day lon nguoi ta su dung 40% dat de lam nha con lai de lam khu vui choi hoi dien tich lam khu vui choi la bao nhieu
