A pentagon has five lines of symmetry. It also has five internal angles.
A square.
Also some irregular polygons with 8, 12, 16 etc sides.
A regular nonagon.
An irregular polygon with 9k sides where every kth side and angle are the same.
An equilateral triangle.
A square
If you had a circle and you halved it, exactly in the middle, then that line would be a line of symmetry! And it is the same with a square. If you halve it exactly in the middle then that would be called a line of symmetry! And then all the lines of symmetry in a square are down, across, diagonal from the left and then diagonal from the right! But in a circle there are LOTS of lines of symmetry!
It has a line of rotational symmetry - along the diagonal.
Axis of symmetry.
effectively yes. Diagonal symmetry is when the line of symmetry goes diagonally, rather than horizontally or vertically
yes
No.
Yes * * * * * Not generally.
yes
Only a line can be diagonal, not a shape
no.
If you draw a diagonal line from corner to corner of a parallelogram, that is a line of symmetry.
A symmetrical shape is said to have line symmetry. A shape that has line symmetry can have one or more lines of symmetry