People have counted 8 or 4 diagonals. If there was four, they might be missing other diagonals. 8 is the proper answer. If you look at other websites, they say 8 [most webs] . To my opinion, it's 8.
only when the rectangle is a square
It has 5 axes of symmetry
5
a rectangle has 2 axes of symmetry
A rectangle has 2 axes of symmetry.
0 if it is irregular, 8 if it is regular. Probably some numbers in between are possible, too.
No but a rectangle does have 2 lines of symmetry
Octagon
Only when the rectangle is a square.
only when the rectangle is a square
False
It has 5 axes of symmetry
Not sure about a duodecagon, but a regular dodecagon has 12 axes of symmetry.
A regular pentagon has five axes of symmetry.
Yes, its diagonals make axes of symmetry. Also, you can rotate it 180° for symmetry.
It is a square
Square