nêu giam chieu dai cua mot hinh chu nhat di 20% thi tang chieu rong them cua hinh chu nhat do len bao nhieu % de dien tich hinh chu nhat khong doi
hoi neu chieu dai cua mot hinh chu nhat giam di 20% thi chieu rong cua hinh do phai tang them bao nhieu phan tram de dien tich cua hinh khong thay doi
tinh dien tich cua mot hinh chu nhat biet neu tang chieu dai cua hinh chu nhat do tang them 20% va giam chieu rong di 25% thi dien tich giam di 36%cm vuong
Mot hinh chu nhat neu tang chieu dai cua no them 20% thi phai giam chieu rong di bao nhieu phan tran de dien tich khong thay doi.
Neu tang chieu dai them 1/4 do dai cua no . Tang chieu rong them 1/5 do dai cua no ti dien tich tang them 12,21.Tinh dien tich hinh chu nhat ban dau.
hoi neu chieu dai cua mot hinh hinh chu nhat giam di 37.5 % thi chieu rong cua hinh do phai tang them bao nhieu phan tram de dien tich hinh khong doi ?
cau 1 : mot cua hang ban lai 20% so voi gia ban . Hoi cua hang lai bao nhieu phan tram so voi gia von
cau 2 : de dien tich mot hinh chu nhat tang len gap doi ma chieu rong chi tang them 25% thi chieu dai phai tang them bao nhieu phan tram
cau 3 : neu giam do dai canh cua mot hinh vuong di 10% thi dien tich cua hinh vuong do giam di bao nhieu phan tram
cau 4 : neu tang do dai canh cua mot hinh vuong them 10% thi dien tich cua hinh vuong do tang them bao nhieu phan tram
hoi neu chieu dai cua mot hinh chu nhat tang them 60% thi chieu rong cua hinh do phai giam di bao nhieu phan tram de dien tich cua hinh khong thay doi ?
neu chieu dai cua mot hinh chu nhat tang them 60% thi chieu rong cua no phai giam di bao nhieu phan tram de dien tich cua hinh khong thay doi