1 mieng dat hinh thang co chieu cao bang 2/3 do dai day be do dai day be bang 4/5 do dai day lon
A) hay tinh dien tich mieng dat hinh thang do biet do dai day lon la 90m?
B) nguoi ta su dung 25% dien tich de trong cam trong moi cay cam can 6m2 dat hoi nguoi ta trong duoc bao nhieu cay cam?
