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

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

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

 mieng dat hinh chu nhat co chieu dai gap 3 lan chieu rong.Nguoi ta mo ve 3 phia mot phia theo chieu dai va hai phia theo chieu rong thi dien tich tang them 123m2 . Tinh dien tich mieng dat sau khi mo rong , biet rang mo rong moi phia them 3m

cho 1 hinh thang ABCD co tong hai day AB va BC la 24 cm. neu mo rong lay nho them 5 cm thi dien tich hanh thang se tang them 30 cm2 . tinh dien tich hinh thang da cho ( ve hinh ro giai)

nguoi ta mo rong mot cai ho nuoi ca hinh vuong ve 4 phia , moi phia rong 9m.Sau khi mo rong dien tich ho tang len 972m vuong . tinh dien tich ho sau khi mo rong.

Co mot hinh vuong neu mo rong ve ben phai  2cm mo rong ve ben phải  2cm mo rong ve ben trai 4cm thi duoc 1hinh chu nhat co chu vi 48cm tinh dien tich hinh vuong

nha truong mo rong vuon truong hinh vuong ve ca 4 phia moi phia them 3 m thi dien tich tang them 336 m². tinh chu vi vuon truong khi mo them

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 ?