A pyramid, being three-dimensional, does not have linesof symmetry.
Your question should really be "How many planes of symmetry does a pyramid have?"
This answer may vary, depending on your definition of symmetry. But normally the answer "Four" is accepted.
It meed not have any.
One. Vertical through the apex.
a scalene pyramid.
A nephroid has 2 lines of symmetry.
It has 2 lines of symmetry.
7
4
It meed not have any.
7
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.
A triangular based pyramid has no lines of symmetry. However, if each of the non-base triangular sides are equal it will have 3 planes of symmetry. If the base triangle is also equal, it will have 6 planes of symmetry.
One. Vertical through the apex.
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.
A triangular pyramid has three lines of symmetry. Each of these lines connects a vertex of the base to the midpoint of the opposite edge on the base.
a scalene pyramid.
a square based pyrmaid has 24 lines of symitry
A nephroid has 2 lines of symmetry.