Mot mieng dat hinh thang co dien tich 864m vuong day lon hon day be 12m. Nguoi ta mo rong mieng dat bang cach tang day lon them 5m thi duoc mot mieng dat moi co dien tich bang 924m vuong. Tim do dai be va day lon cua manh dat hinh thang luc chua mo rong

mot manh dat hinh thang co day be 8.5m day lon 15m sau khi mo rong day lon them 3m thi dien tich manh dat tang 7.5m2 tinh dien tich hinh thang ban dau.

mot manh dat hinh thang co dien tich la107,5 m2.Sau khi mo rong day nho 3 m,day lon 5 m thi dien tich manh dat tang them 43 m2.Tinh do dai moi day manh dat,biet day lon hon day be la 4 m

Mot hinh thang co dien tich la 282,1m2 day nho 17dm day lon 28,5dm nguoi ta mo rong day lon cua hinh thang de   dien tich   hinh thang tang them 37,2dm2 hoi can mo rong day lon them bao nhieu dm

Mot hing thang co day lon la 48cm day nho bang 75% day lon nguoi ta mo rong day lon them 8cm va day nho them 12cm thi duoc mot hinh thang moi co dien tich lon hon dien tich hinh thang ban dau la 100cm2 .Tinh dien tich hing thang ban dau?

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?

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

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 co day be bang 3/5 day lon va co chieu cao bang 23cm.Nguoi ta mo rong hinh thang bang cach keo dai day be cho bang day lon da duoc1 hinh chu nhat ,sau khi mo rong thi dien tich tang them 207cm vuong .Tinh dien tich hinh thang luc chua mo rong?