ha dan giay mau vao cac mat cua mot hop qua hinh lap phuong caanh 2 dm hoi tinh dien tich giay mau da dan la bao nhieu de xi met vuong ?

ban an lam mot cai hop dang hinh lap phuong bang bia co canh 10cm .

tinh the tich cai hop do .

neu dan giay mau tat ca cac mat mat ngoai cua hop do thi ban an can dung bao nhieu xang-ti-met vuong ?

Nguoi ta ghep hai khoi lap phuong de duoc mot khoi hop chu nhat nhu hinh ve ben. Nguoi ta muon dan giay mau trang tri cac mat cua khoi hop chu nhat sao cho hai hinh vuong lien nhau duoc dan hai mau giay khac nhau. Em tinh xem can it nhat may loai giay may khac nhau de dan trang tri theo yeu cau noi tren.

ban nao lam duc minh tick cho

mot cai thung hinh hop chu nhat khong nap duoc lam tu 84 dm vuong giay ( ko ke mep dan) co dien tich xung quanh bang 5/2 dien tich mat day. hoi dien tich toan phancua thung la bao nhieu

tam bia canh ben duoc gap lai thanh mot hinh lap phuong 

hoi:

a) hinh lap phuong nay co mat doi dien voi mat d la mat nao trong cac mat a,b,c,e,f?

b) the tich hinh lap phuong neu tren la bao nhieu met khoi? bao nhieu de- xi-met khoi

nguoi ta lam 2000 hop bang cat tong co hinh dang la hinh lap phuong canh 16cm.Dien tich cac mep dan la 6% dien tich hop.Hoi can bao nhieu met vuong cat tong?

Ban Hien lam mot cai hop dang hinh hop chu nhat bang bia co chieu  dai 25cm, chieu rong 12cm va chieu cao 10cm.

a) Tinh the tich cai hop do .

b) Neu  dan giay mau tat ca cac mat ngoai cua hop do thi ban Hien can dung bao nhieu xang-ti-met vuong giay mau?

mot cai hop dang hinh hop chu nhat  co chieu dai  20 cm , chieu rong  15 va chieu cao 10 cm . ban binh  dan giay mau do vao cac mat xung quanh  va giay mau vang vao hai mat day cua cai hop do [chi dan mat ngoai] . hoi tinh dien giay mau nao lon  hon va lon hon bao nhieu