For a 2-dimensional object, a line of symmetry is a line such that, if you were to fold the object along that line, the two sides would match up exactly.
For a 3-dimensional object, a line (axis) of symmetry is a line such that, if you were to rotate the object around it, its shape would remain the same.
2 lines of symmetry
A nephroid has 2 lines of symmetry.
A parallelagram can be a square, which has four lines of symmetry or a rectangle which has two lines of symmetry but the generic parallelagram has zero lines of symmetry
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
5 lines
2 lines of symmetry
it has five lines of symmetry
A nephroid has 2 lines of symmetry.
Equilateral Triangles (3 lines of symmetry)Rectangles (at least 2 lines of symmetry)Squares (4 lines of symmetry)Rhombuses (at least 2 lines of symmetry)Any regular polygon (at least 5 lines of symmetry)
it has no lines of symmetry
A parallelagram can be a square, which has four lines of symmetry or a rectangle which has two lines of symmetry but the generic parallelagram has zero lines of symmetry
There is no such thing as 8 lines of symmetry. A circle, for example, has infinitely many lines of symmetry.
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
5 lines
Lines of symmetry are 2 dimensional. Planes of symmetry are 3D.
10 lines of symmetry
4 Lines of symmetry