mot hinh thang co day nho la 14cm va bang 1/2 day lon.Neu mo them 4,5cm thi dien tich tang them 27cm2.Tinh dien tich hinh thang ban dau
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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 co day be la 19 cm va bang 1/2 day lon. Neu mo rong day lon them 4,5 cm thi dien tich tang them 27 cm2. Tinh dien tich hinh thang ban dau.
1 hinh thang co day lon 24cm,day nho bang 2/3day lon.Neu keo dai day lon them 5cm thi dien tich hinh thang tang len 30 cm2. Tinh dien tich hinh thang luc dau
mot hinh thang vuong co day lon 32m chieu cao 18m . nguoi ta mo rong day nho thi thanh hinh chu nhat va dien tich tang them 81m vuong t. tinh dien tich ban dau
Mot hinh thang co day be 12cm,day lon dai 18cm.Neu mo rong day lon them 5cm thi dien tich tang them 20cm2 Tinh dien tich hinh thang ban dau
mot thua ruong hinh thang co day lon la48m,day be=75% day lon.neu tang day be them 12m,day lon them 8mthi dien tich tang 100m2.tinh dien tich thua ruong ban dau?
mot thua ruong hinh thang co day lon 62,5,day be bang 2/5 day lon .nguoi ta mo rong thu ruong bang cac keo dai day be them 12,4m va day lon them 8 m nen dien tich thua ruong tang them 367.2.tinh dien tich thua ruong hinh thang ban dau
1 hinh thang co tonh 2 day la 65dm.khi tang day lon them 5dm thi dien tich tang them 45dm2 tinh dien tich hinh thang ban dau
mot hinh thang vuong co day be=3\5 day lon va chieu cao=23cm nguoi ta mo rong hinh thang de duoc HCN thi dien tich cua no tang them 207cm2.hay tinh dien tich hinh thang luc ban dau