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.
put it on with 2 belts in front & 2 in back, slide the rubber clasp out at bottom of belts, put top part of hose in clasp & replace rubber into clasp catching hose. repeat on all three sides. ( if the hose have seams make sure they are straight.)
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
a decagon i believe has either 5 or 20 opposite sides * * * * * A decagon has 10 sides so I cannot see how it could have 20 opposite sides. It has 5 pairs of opposite sides but this does not mean that these opposite sides face each other. In an irregular decagon it is quite possible for opposite sides to be at right angles or at any angle to each other.