A pentagonal pyramid has five planes of symmetry. It is comprised of five equilateral triangles forming a pyramid on a pentagonal base.
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.
five, all looking from the top, one every 72o
6
4
five
Five
5
16
Two.
4
A pentagonal pyramid has 6 faces.
If it is a right pyramid then four, otherwise one or none.