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

mot hinh thang co day lon 42 dm , day bé bang 80 phan tram day lon , chieu cao bang trung binh cong 2 day . tính dien tích hình thang do.

mot hinh thang co day lon la 2,5 dm , day be bang 3/5  day lon ,  chieu cao bang 80 % day lon . tinh dien tich hinh thang  do

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

Tim dien tich cua mot hinh thang co hieu hai day bang 12 cm, day be bang 3 phan 5 day lon, day lon bang 3 phan 2 chieu cao

tinh dien tich hinh thang co day lon bang 25m,chieu cao bang20m,day be bang 90 phan tram chieu cao

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 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}