A rectangular solid that is not a cube has 3 planes of symmetry.
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Two.
there is 9 planes of symmetry in a cube
it has 5 planes of symmetry
There are infinite planes of symmetry in a cylinder in the same way that a circle has infinite lines of symmetry.
There are no lines of symmetry in a 3d figure.The right question is how planes of symmetry are there in a pentagonal pyramid.Then the correct answer is 5 planes of symmetry.