A 5 pointed star has 10 sides.
138
Seven
4
One.
A 3D star is not a standard shape. You can easily add another point.
a shape with 5 sides
The number of lines of symmetry in a star depends on its specific shape and the number of points it has. For example, a classic five-pointed star has 10 lines of symmetry. Each line can be drawn through a point and the opposite side or through the midpoints of the star's arms. Other star shapes may have different numbers of symmetrical lines.
the shape has 1 side of symmetry
An octagonal shape has 8 sides
An octagonal shape has 8 sides
The answer will depend on the sizes and positioning of the squares. You could make a 16-sided polygon (8-pointed "star"), a 4-sided rectangle, or very many shapes between the two.
A star is not a specific shape: it is a generic word for a shape which has an even number of vertices. The interior angles at alternate vertices are usually reflex angles. A star can have six or more vertices.