octagon
rhombus
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.
square and rectangles are technicality squares
Yes.
a pentagon
infinite.
An equallateral triangle ~ID1533681184 Sorry ID1533681184 but and equallateral triangle does not have three lines of SYMMETRY, it has three line segments. ~EEE2
A rectangle.
pentagram
it has four right angles and has four lines of symmetry
rectangle