A square
a square
a pentagon
Parrallelogram (it has rotational symmetry but no lines of symmetry)
A rectangle.
pentagram
If your asking what shape has three lines of symmetry, your answer would be an equilateral triangle. You can tell how many lines of symmetry a shape that has all angles of the same measure has by looking at it's angles. Ex., pentagon has five angles--five lines of symmetry; octagon has eight angles, eight lines of symmetry; etc.
A rectangle.
a square
a pentagon
Parrallelogram (it has rotational symmetry but no lines of symmetry)
A rectangle. Obviously the right angles are in the four corners of the rectangle. The lines of symmetry occur across the horizontal and vertical. There are no lines of symmetry on the diagonal.
A rectangle.
pentagram
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.
octagon
Square
A pentagon has 5 lines of symmetry and no right angle.