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I have revised this answer. This question is harder than it looks!
The numbers 69, 6009 or 98886, for example, would have rotational symmetry (looks the same when rotated by 180 degrees) but not reflection symmetry.
So I think the answer is going to be something like:
A number which consists of the digits 6 and 9 plus or minus the digits 0 & 8 AND has the digits in the necessary order to maintain rotational symmetry.
Add your answer:
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What is the symmetry in a rhombus?
There is reflective symmetry about each of the diagonals as well as rotational symmetry or order 2.
What letters have no symmetry?
The answer depends of the font.In broad terms, in the upper case letters:F, G, J, L, P, Q and R.The others have reflective (or line) symmetry, or they have rotational symmetry, or both.
What is the difference between line symmetry and rotational symmetry?
Line or reflective symmetry is really a special case of rotational symmetry but from a different viewpoint. In line symmetry imagine a line going north to south on the page. If you rotate an image out of the page around that line through 180 degrees you get a reflection. For rotational symmetry imagine that same line being perpendicular to the page so that you see it as a dot. The image is then rotated around that dot.
What is the rotational symmetry of a trapezoid?
A trapezium does not have rotational symmetry.
Does z have rotational symmetry but no line symmetry?
The letters H and Z have both line symmetry and rotational symmetry
Does a hexagon have reflection symmetry?
it has both reflective and rotational symmetry
Is the letter H rotational or reflective symmetry?
Both.
What is the symmetry in a rhombus?
There is reflective symmetry about each of the diagonals as well as rotational symmetry or order 2.
What quadrilateral has rotational symmetry and reflective symmetry in special cases?
Rhombus has an 180 degree rotational symmetry, but no reflectional symmetry. Ps. i roll for my black men
What shape has sometimes has one line of reflective symmetry but no rotational symmetry?
How about an isosceles trapezoid
Is it true that symmetry is the quality a design if it maintains all characteristics when it is rotated about a point?
No. Objects can have reflective symmetry but no rotational symmetry.
How many symmetry lines are there in a hexagon?
A regular hexagon has 6 rotational symmetries (rotational symmetry of order six) and 6 reflective symmetries (six lines of symmetry).
Does the letter h have reotational symmetry?
A lower-case 'h' has rotational symmetry. An upper-case 'H' also has reflective symmetry.
What capital letters have rotational symmetry but not any lines of reflective symmetry?
Depending on the font, they are N, S and Z.
How many lines of symmetry for a rectangle?
Four - Two reflective, and two rotational about the diagonals.
What 3 capital letters other than O have rotational symmetry but no lines of reflective symmetry?
M w h
How do you find a sequence of rigid motions for quadrilaterals?
The answer depends on the quadrilateral. Some have rotational symmetry or reflective symmetry and it is not possible to distinguish between these and translations.
