Circles and discs (separate things as a circle is the edge or circumference only wereas a disk is inside of circle also)
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1Impoved Answer:-A circle has infinite lines of symmetry
A circle has infinite lines of symmetry, any line going through the center is a line for symmetry.
There are an infinite number of lines of symmetry in a circle, as any diameter will be a line of symmetry and there are an infinite number of angle measure for that line to pass through.
There are infinitely many such shapes. To start with, any regular will do.
it depends on what kind of 3D shape you want. example= A sphere has an infinite amount of symmetry lines