Các câu hỏi tương tự
mot mieng bia hinh chu nhat co vhu vi gap 5 lan chieu rong neu tang chieu rong them 9 cm tang chieu dai them 4 cm thi mieng bia tro thanh mot hinh vuong tinh dien tich ban dau cua mieng bia
mot mieng bia hinh chu nhat co chu vi gap 5 lan chieu rong neu tang chieu rong them 9 chieu dai them 4 thi mieng bia tro thanh mot hinh vuong dien tich mieng bia ban dau\
mot mieng bia hinh chu nhat co chu vi gap 5 lan chieu rong
neu tang chieu rong them 9cm tang chieu dai len 4cm thi mieng bia tro thanh mot hinh vuong dien tich ming bia ban dau la
mot mieng bia hinh chu nhat co chu vi gap 5lan chieu rong neu tang chieu rong 9cm va chieu dai 4cm mieng bia tro thanh hinh vuong dien tich ban dau
1 hcn gap 2 lan CR . Neu tang CD them 10m va tang CR them 15mthi duoc hcn co CD gap ruoi CR
a)tinh CD,CR hcn ban dau
b) tinh chu vi , dien tich hcn ban dau
giup mk di mk dang can gap mai phai nop bai roi!
Mot hcn co cd gap ruoi cr .neu moi chieu tang them 2m thi hcn moi co dien tich tang them 64m2.tinh dt ban dau hcn
mot hcn co chieu dai gap ruoi chieu dai neu moi chieu tang them mot 1m thi duoc mot hcn moi co dt tang them 26m2 tinh chu vi hcn ban dau
mot hinh chu nhat co chu vi gap 5 lan chieu rong neu tang chieu dai them 3 tang chieu rong them 9 thi duoc mot hinh vuong tim so do canh hinh chu nhat da 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?