mot manh vuon hinh thang co day be bang 90m day lon bang 5/3 day be va chieu cao bang 3/4 day lon 

a tinh dien tich manh vuon hinh thang

b neu tang day lon them 2,5m thi dien tich phan tang them cua manh vuon do la bao nhieu met vuong

Mot hinh thang co hieu hai day la 12cm. Day be bang3/5 day lon. Day lon bang 3/2 chieu cao. Tinh dien tich hinh thang

                                    _{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 hinh thang co day lon bang 48 dm , day be bang 25 phan tram day lon va chieu cao bawng 75 phaan tram day be .Tinh dien tich hinh thang

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 day lon la 36 cm day be bang 80 phan tram day lon chieu bang 2 phan ba day lon tinh dien hinh thang do 

Mot manh dat hinh thang co day lon hon day be 18m day lon gap ruoi day be chieu cao bang 5 phan 6 day lon . Tinh dien tich cua manh dat do

mot hinh thang co day lon 120dm day be bang 1/3 day lon chieu cao bang trung binh cong cua hai day tinh dien tich hinh thang do

Mot manh dat hinh thang co day be bang 180 m , day lon bang 14 phan 9 day be, chieu cao bang 4 phan 7 day lon . Hoi dien tich manh dat bang bao nhieu met vuong , bao nhieu hec ta