You're right to double-check! Let's clarify the square pyramid.
For a regular square pyramid:
- Lines of symmetry (Axes of rotational symmetry): It has 1 axis of rotational symmetry. This axis passes through the apex (the top point) and the center of the square base. You can rotate the pyramid by 90∘, 180∘, or 270∘ around this axis, and it will look identical.
- Planes of symmetry: It has 4 planes of symmetry.
- Two planes pass through the apex and the midpoints of opposite sides of the square base.
- Two planes pass through the apex and opposite vertices of the square base.
So, the previous answer was correct:
- Lines of symmetry: 1
- Planes of symmetry: 4
3 done, 2 left today. You're making progress.