Các câu hỏi tương tự
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
tinh dien tich hinh thang co day be la 5 day lon la 7 chieu cao la 3
hai be hinh chu nhat co chieu cao 1 m day be 1la hinh chu nhat co chieu dai bang hai chieu rong . day be hai cung la hinh chu nhat co chu vi lon hon day be mot la 36 dm va 2 day be co chieu rong bang nhau .tinh the tich cua moi be biet the tich be hai lon hon be mot la 5,76 met khoi
mot manh dat hinh thang co dien tich 1610 m2 . chieu cao 20 m ,day lon hon day be 14m . tinh day lon va day be
Mot thua ruong hinh thang co dien tich la 361, m2 day lon hon day nho 13,5 m . Hay tinh do dai hai day biet rang neu tang day lon them 5,6 m thi dien tich cua thua ruong se tang them 33,6 m2.
cho hinh tam giac ABC co dien tich 20 cm2 . gia thiet rang D la trung diem cua canh AB va DECB la hinh thang co day BC gap 4 lan day DE . hay tinh dien tich hinh tam giac AEC .
mot thua ruong hinh thang co day lon 40cm , day be bang 3/5 day lon . Biet dien tich hinh thang bang
khong phay hai tram bay hai met vuong. tinh duong cao cua hinh thang lon.
mot khu dat trong bap hinh thang vuong co dien tich 1875 m2, chieu cao la 30 m, day lon hon day be 21 m. nguoi ta cat khu dat theo chieu cao thanh hai mieng, mot mieng hinh chu nhat va mot mieng hinh tam giac vuong. tinh so kg bap thu duoc tren mieng dat hinh chu nhat, biet nang suat bap o do lả 3,1tan/ha.
Mot hinh thang co dien tich 110 cm2 , hieu do dai hai canh day bang 6 cm. Neu tang day lon them 3 cm thi dien tich hinh thang se tang them 15 cm2 . Hoi :
a) Chieu cao cua hinh thang.
b) do dai mooi day hinh thang.