Although some may claim it has a horizontal symmetry, closer inspection will show that the lower part is larger than the upper part and so the letter is NOT symmetrical.
A capital "B" has one horizontal line of symmetry.
The letter B has one set of line symmetry.The top of the B and the bottum.
yes it has one * * * * *No, the lower case letter has no line of symmetry.
Usually none.In some fonts, though, it may have a horizontal line of symmetry - half-way up.