Các câu hỏi tương tự
mot hinh tam giac co day la 35 dm , neu keo dai canh day them 2.7 m thi dien tich tam giac tang 5.265 m2 dien tich hinh tam giac do la
1 hinh Tam giac co day 15m . Neu keo dai day them 7m thi dien tich tang them 28m . Tinh dien tich hinh Tam giac do
Bài 1:1 mieng dat hinh tam giac co hieu giua day va chieu cao la 10,5m. tinh dien tich mieng dat do, biet rang neu tang canh day them 3,6m thi dien tich mieng dat se tang them 79,2m2
Bài 2:1 mieng vuon hinh tam giac co đỉnh A va day BC dai 45m. neu keo dai canh day BC them 1 doan CD dai 15m thi dien tich se tang them 225m2.
,tinh dien tich mieng vuon do bang đơn vị ha
a)Mot hinh tam giac ABC co day BC la 34,5dm. Neu keo dai canh BC ve phia C mot doan bai 7 dm thi dien tich tang them 42 dm2 .Tinh dien tich hinh tam giac ABC.
b)Mot hinh thang co tong hai day la 78dm,day lon bang 7/6 day nho .Chieu cao bang 1/2 day lon .Tinh dien ich hinh thang do
1 hinh tam giac co dien tich 120cm2. neu keo dai day them 3cm thi dien tich se tang them 30cm2. tinh canh day hinh tam giac
HINH TAM GIAC ABC CO DO DAI DAY LA 7 CM,NEU THEM 3,5 CM VAO DO DAI DAY THI DIEN TICH TANG THEM 14 CM . TINH DIEN TICH HINH TAM GIAC
mot miemg bia hinh tam giac co do dai day la 9,8 . neu keo dai day them 1/2 do dai vua no thi dien tich mieng bia tang them 12,74 . tinh dien tich mieng bia do
mot thua dat hinh tam giac co day la 25 m neu keo dai day them 5 m thi dien tich se tang them 50 m2 tinh dien tich thua ruong ban dau
1 thua dat hinh tam giac co chieu cao la 10 m neu keo dai day them 4 m thi chieu dai day la 14m tinh dien tich ban dau va dien tich tang them
giup minh nha ! thank you !