1 hinh thang co chieu cao la 10m hieu 2 day la 22m keo dai day nho = day lon de hinh da cho thanh hinh chu nhat co chieu dai = day lon chieu rong = duong cao hinh thang dien tich duoc mo rong them = 1/7 dien tich hinh thang cu 1 phan mo rong them co dien tich la 90m2 

Cho hinh thang co duong cao 10 cm . Hieu hai day la 22 cm . Keo dai day nho bang day lon de thanh hinh chu nhat co chieu dai bang day lon, chieu rong bang chieu cao hinh thang . Dien tich duoc mo rong them bang 1/7 dien tich hinh thang cu.Phan mo rong ve phia ben phai co dien tich 90cm vuong .Hay tinh day lon cua hinh thang ban dau

                                    _{Mot hinh thang co chieu cao bang 10m hieu 2 day la 22m keo dai day nho bang day lon de hinh da cho thanh hinh chu nhat co chieu dai bang day lon chieu rong bang duong cao hinh thang dien tich duoc mo rong them 1/ 7 dien tich hinh thang cu phan mo rong them co dien tich la 90m2 tinh do dai day lon cua hinh thang ban dau} 

Mot thua ruong hinh thang vuong co day be bang chieu cao va bang mot nua day lon .Thua ruong do duoc mo rong thanh hinh chu nhat. Tinh dien tich hinh thang biet dien dien tich phan mo rong la 5dam2.

mot thua ruong hinh thang co chieu cao la 10m hieu cua 2 canh day la 22m.Nguoi ta mo rong thua ruong do thanh hinh chu nhat co chieu daibang canh day lon va chieu rong bang chieu cao .Dien tich duoc mo rong bang 1phan7 dien tich cu .phan dat mo mo rong them ve phia tay phai la 90m vuong .Tinh day lon cua thua ruong cu

1 hinh thang co chieu cao 10m , hieu hai day la 22 m . Keo dai nho cho bang day lon thanh 1 hinh chu  nhat co chieu dai bang day lon, chieu rong bang chieu cao . Dien tich mo rong 1/7 dien tich cu. Phan mo rong ve phia tay phai co  dien tich 90 m2. Tinh day lớn của hình thang ban đầu .

vuon thuc nghiem truong em hinh thang co day lon la 24m day be bang 2/3 day lon  chieu cao la 12m 

A] tinh dien tich vuon thuc nghiem 

B] nay nha truong muon mo rong them dien tich de tro thanh mot khu vuon hinh chu nhat hay tinh dien tich phan dat mo rong

Mot hinh thang vuong co day be=3/5 day lon va co chieu cao =23cm .Nguoi ta mo rong hinh thang bang cha keo dai day be cho bang day lon de duoc mot hinh chu nhat, sau khi mo rong dien tich hinh thang tang them 207cm .Tim dien tich hinh thang luc chua mo rong?

1 thua ruong hinh thang vuong co day be dai bang chieu cao va bang nua day lon.thua ruong do duoc mo rong thanh hinh chu nhat .tinh dien tich hinh thanh biet dien tich mo rong la 5 dam2