Mot thua ruong co chu vi 180 m.Neu tang chieu rong them 5m va giam chieu dai di 5 m thi duoc thua ruong hinh vuong.
Tinh dien tich cua thua ruong hinh chu nhat ban dau.
ot thua ruong hinh chu nhat co chu vi la 480.Neu tang chieu rong 28 m va giam chieu dai 20 m thi thua ruong do tro thah hinh vuong.dien tich thua ruong luc dau.
mot thua ruong hinh chu nhat co chu vi 100 m nguoi ta tang chieu dai len 1/3 chieu dai thi chu vi hinh moi la 120 m tinh dien tich thua ruong ban dau
Mot thua ruong hinh chu nhat co chu vi bang chu vi mot hinh vuong co canh 25m. Chieu dai hinh chu nhat bang 2/3 chieu rong. Tinh dien tich thua ruong. B/ nguoi ta trong rau tren thua ruong, cu 5m2 thu duoc 15kg rau. Hoi thua ruong thu duoc bao nhieu ta rau.
hai thua ruong hinh chu nhat co chieu rong bang nhau . thua ruong thu nhat co chieu dai 435 m va dien tich 92655 m. thua rong thu hai co chieu dai 354 m . tinh chu vi va dien tich thua ruong thu hai
Tinh dien tich cua thua ruong hinh chu nhat co chu vi la 360 cm.Biet rang,neu tang chieu rong 25 m va giam chieu dai 5 m thi thua ruong co dang hinh vuong.
mot thua ruong hinh chu nhat chieu rong bang 3/5 chieu dai, co chu vi bang chu vi mot thua ruong hinh vuong, moi canh 32m. tim dien tich thua ruong?
mot thua ruong hinh chu nhat co chu vi la 100m.Nguoi ta tang chieu dai len 1/3 chieu dai thi chu vi hinh chu nhat moi la 120m.Tinh dien tich thua ruong ban dau
MOT THUA RUONG HINH CHU NHAT CO NUA CHU VI LA 136M , BIET CHIEU DAI BANG 5 PHAN 3 CHIEU RONG A TINH DIEN TICH THUA RUONG DO B NGUOI TA TRONG LUA TREN THUA RUONG , CU 1M VUONG THI THU DUOC 3 PHAN 5KG THOC THU DUOC TREN THUA RUONG DO