Seven
There are no straight lines in the letter "W" because it is made up of two diagonal lines intersecting at a point.
Four FHNZ
the alphabet has 26 letters in it
Four. F, G, J, L
It depends on which alphabet you are talking about. The Latin alphabet for English has 11 upper case curved letters (BCDGJOPQRSU) and 18 lower case curved letters (abcdefghjmnopqrstu)
Seven
There are no straight lines in the letter "W" because it is made up of two diagonal lines intersecting at a point.
Four FHNZ
the alphabet has 26 letters in it
all
Runes were a written alphabet alphabet used by the Vikings, consisting of various symbols that could be efficiently carved into stone or wood, due to the many straight lines and no curved lines.
As with the Roman alphabet, which you may be familiar with it (since you are using it to read this answer), different letters have different symmetries.
The official Philippine alphabet has 28 letters.
There were 22 letters in the Phoenician alphabet.
The English language alphabet has 26 letters.
The Somali Latin alphabet has 32 letters. The Somali Osmanya alphabet has 22 letters.