Hinh thang vuong ABCD coAB = AD = 1/2DC . mo rong hinh thang ve phia canh ben de co hinh chu nhat AECD , biet phan mo rong co dien tich 32 m2 . tinh dien tich hinh thang ABCD

mot san kho hinh vuong duoc mo rong ve phia ben phai 3m,phia duoi them 10m nen tro thanh hing chu nhat co chu vi bang 106m.Tinh dien tich san kho ban dau ?

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

CHO HÌNH VUÔNG ABCD NẾU MO RONG VE BEN TRAI 4M VA MO RONG VE PHIA DUOI 4M THI DIEN TICH SE TANG THEM 160M2 .TINH DIEN TICH HINH VUONG ABCD

San tap the duc hinh vuong duoc mo rong ben phai them 2m va phia duoi them 4m de thanh hinh chu nhat co chu vi 100m. Tinh dien tich ban dau san tap

1 manh dat hinh vuong duoc mo rong ve ben phai 5m phia tren 5m nen dien tich tang them 125m2 . tinh dien tich

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

cho hinh thang abcd co ab bang ad bang 1/2 cd. mo rong hinh thang ve phia canh ben de co hinh chu nhat aecd,phan mo rong co dien tich la 50m2 .vay dien tich hinh thang abcd la ?

mot hinh thang vuong co day be bang 3/5 day lon va chieu cao la 23m .Nguoi ta mo rong thua ruong ve phia canh ben khong vuong goc voi hai day de thua ruong thanh hinh chu nhat .Sau khi mo rong dien tich tang len 207m2 .

a,Tinh dien tich hinh thang ban dau 

b,Tinh xem sau khi mo rong dien tich tang len bao nhieu phan tram

                ghi cach giai giup minh nhe .Cam on.