text: 
  def simetrica(m):
      nlinhas = len(m)
      ncolunas = len(m[0])
  
      for i in range(nlinhas):
          for j in range(i+1,ncolunas):
              if m[i][j] != m[j][i]:
                  return False
  
  
      return True
  
  m = [[1,2,3],[2,4,5],[3,5,2]]
  print(simetrica(m))
  
  
  
  