I don't know why they are different in western societies, but I do know why the male's clothes fasten the way they did. In a society of right handed people, warriors carried their sword on their left hip. If they pulled it out and the hilt snagged in the buttons, he could end up dead. So the overlap was made left over right.
blame the kings and queens for that one, back in midevil times, the kings dressed themselves, the queens and princesses were dressed by servants, usually male. therefore the male buttons, zips, and belts on the right, for the right handed, while the womens is always to the left, because it would be the right hand of the male servent dressing her.
Some think it is because women used to be dressed by others therefore the sides were reversed.
It goes back in time when wealthy people had butlers, and maids to help them to dress: men normally dressed themselves but ladies had other women to help them dress and women naturally had clothing buttons reversed to help maids clothe them. And, the tradition continues to this day with the reversed buttons on women's clothing.
paramid
They are the sides facing each other at opposite sides.
rectangle
Opposite sides are parallel.Opposite sides are congruent.Opposite angles are congruent.
The opposite sides of a parallelogram are parallel
A heptagon has seven sides so there are no pairs of opposite sides.
Parallelogram opposite sides are congruent opposite sides parallel
parellelagram
A parallelogram has opposite equal parallel sides