Tinh dien tich hinh thang co day lon = 50 dm va = 80 % chieu cao ,day be kem day lon 12 dm
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 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 abcd co day be bang 3/5 day lon va day be kem day lon 12 cm.Tiinh chieu cao cua hinh thang do biet dien tich hinh thang la 360
mot dam ruong hinh thang co dien tich 1155m2 va co day be kem day lon 33m nguoi ta keo dai day be them 20m va keo dai day lon them 5m ve cung mot phia de duoc hinh thang moi dien tich hinh thang moi nay bang dien tich cua mot hinh chu nhat co chieu rong bang 30m va chieu dai 51m hay tinh day be day lon cua hinh thang ban dau
mot manh ruong hinh thang co day lon 24,8 m , day nho bang nua day lon va kem chieu cao 12,5 dm . tinh dien tich manh ruong do
a/ mot hinh thang co dien tich la 20 m vuong day lon 55 dm va day be 45 dm tinh chieu cao hinh thang
b/ tinh trung binh cong hai day biet dien tich hinh thang bang 7 m vuong va chieu cao bang 2 m
a)Mot hinh thang co dien tich 20m2,day lon 55 dm va day be 45dm.Tinh chieu cao cua hinh thang.
b)Tinh trung binh cong hai day cua mot hinh thang,biet rang dien tich hinh thang bang 7m2 va chieu cao bang 2m
