Mot thua ruong hinh chu nhat co chu vi 98m, chieu rong bang 3/4 chieu dai.tinh dien tich thua ruong do
mot hinh chu nhat co chieu dai hon chieu rong 320m chieu rong bang 1/5 chieu dai.
a) tinh chu vi va dien tich hinh chu nhat do.
b) phai bot chieu dai va tang chieu rong them bao nhieu met de hinh chu nhat tro thanh hinh vuong ma chu vi khong thay doi
2.
mot thua ruong hinh chu nhat co chu vi la 360m , chieu dai . tinh dien tich thua ruong .
mot thua ruong hinh chu nhat co nua chu vi la 350m, chieu dai hon chieu rong 50m. Tinh chu vi hinh va dien tich thua ruong do
mot thua ruong hinh chu nhat co chieu dai hon chieu rong 28m,biet chu vi cua thua ruong do la108m.Tinh dien tich thu ruong do.
Mot thua ruong chu nhat co chu vi 200m chieu dai hinh chu nhat do hon 2 lan chieu rong la 10m. Tinh dien tich thua ruong
mot thua ruong hinh chu nhat co chieu dai 80m chieu rong bang 2/5 chieu dai tinh dien tich thua ruong hinh chu nhat do
mot thua ruong hinh chu nhat co chu vi la360m biet rag chieu rong bang 1/2 chieu dai.tinh dien tich thua ruong
mot thua ruong hinh chu nhat co chieu dai gap 3lan chieu rong va lon hon chieu rong 40m .
a, tinh dien tich thua ruong do la.
b. nguoi ta trong lua tren thua ruong do ,cu 1m2 thu duoc 3kg thoc . hoi thua ruong do thu hoach duoc bao nhieu ta thoc
Mot hinh chu nhat co chu vi 160m chieu dai hinh chu nhat hon 2 lan chieu rong la 10. Tinh dien tich thua ruong