A kite
triangle
Two pairs of touching sides are the same length. The diagonals meet at right angles. Opposite sides are not parallel.
Draw a line touching one side to the opposite side of the square, which is not parallel to any side, and does not touch any vertex, so you will have two new quadrilaterals, each one has one pair of parallel sides and one pair of nonparallel sides.
two diagonal lines that aren't touching
The meaning of Parallel lines.This are lines that go straight without meeting together or touching each other. They don't intersect. This is like when you put, for example 11 horizontally if they were long enough they can not meet each other.
The shape you are referring to is a kite.
triangle
Two pairs of touching sides are the same length. The diagonals meet at right angles. Opposite sides are not parallel.
Not touching anybody.
In Euclidean geometry, if and only if they are parallel.
If two lines go on forever without touching but are not parallel, they are skew, lines that do not lie in the same plane.
Draw a line touching one side to the opposite side of the square, which is not parallel to any side, and does not touch any vertex, so you will have two new quadrilaterals, each one has one pair of parallel sides and one pair of nonparallel sides.
two diagonal lines that aren't touching
Friction force. [opposite force]
1st position and parallel (or 6th position)
Friction force. [opposite force]
Friction force. [opposite force]