Just 1.
MOW (in some fonts), OXO
Yes
symetry
No, it does not. If you draw a horizontal line through it ("deed") you won't see the symmetry. But if you make "DEED" by capitalizing the letters, yes it will. Draw a line left to right through the middle of the letters and you have a line of horizontal symmetry.
Yes, but only in fonts in which the letter "m" is symmetric.
"DEED" is a word that has rotational symmetry.
There are one word that can have a rotational symmetry. It is POD. When you copy it and flip it, it will give you pod again.
The letter "Z" has two lines of rotational symmetry. When rotated 180 degrees, it looks the same, but it does not have any other angles at which it maintains its appearance. Thus, it exhibits rotational symmetry only at this specific angle.
All of them. To be precise, since a circle is perfectly round (in theory, although humans can't reproduce such circularity - is that a word?) it will have infinity rotational symmetry.
"you" is a word, not a letter and it does not have rotational symmetry.
Paizza
MOW (in some fonts), OXO
Only the I has a horizontal line of symmetry. Visualize folding PIZZA in half through the letters. Only the I would fold down perfectly on top of itself, so it has a horizontal line of symmetry.
The word "symmetry" has three syllables.
There are 3 syllables in the word symmetry.
Symmetry has three syllables.
None, since the letter "e" does not have any symmetry.