Only 8 although in some fonts, also 1, 2 and 5.
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Numbers that have rotational symmetry are those that look the same after being rotated by certain angles. In the case of single-digit numbers, the numbers 0, 1, and 8 have rotational symmetry. When rotated 180 degrees, 0 and 8 look the same, and when rotated 90 degrees, 1 looks the same. Numbers like 2, 5, and 6 do not have rotational symmetry as they look different when rotated.
Well, honey, numbers like 11, 88, 69, and 96 have rotational symmetry because they look the same when flipped or rotated. Just like a good martini, these numbers are perfectly balanced no matter which way you turn them. So, if you're looking for a numerical twirl, those are the ones to go for between 100 and 1000.
No a Z doesn't have a rotational symmetry
A trapezoid has no rotational symmetry.
It has line symmetry (straight down the center) but not rotational symmetry.