Yes you can.
Parallelograms have parallel diagonals (these include squares, rectangles, rhombi, an trapezoids). Parallel lines are lines with the same slope that could carry on infinitely without intersecting. A parallelogram can have 1 or 2 sets of parallel lines.
It is impossible for parallel lines to intersect because parallel means lines that run alongside each other without intersecting.
If two lines go on forever without touching but are not parallel, they are skew, lines that do not lie in the same plane.
They could be: parallel lines, perpendicular lines or intersecting lines
Well, parallel lines are a pair of lines that could go on forever without intersecting. They could be going in the vertical direction or in the horizontal direction. I'm going to list a few shapes; circle triangle I'm sure there are more, but those are the only ones I could think of at the top of my head.
Wrong statement. Parallel lines don't always make vertical angles without the transversal, the line that passes through these lines. Without the transversal, we can't make the conclusion that parallel lines form vertical angles.
The circles could be in 2 planes that are parallel to each other. Lines and planes can be parallel. Lines of latitude are examples of circles that are in parallel planes.
Well, you see, parallel lines are lines that do not and will not ever intersect at any length of the line
They could be lines with the same gradient (or slope).
No, parallel lines do not meet at a right angle. In theory, parallel lines never meet. In practice, parallel lines on earth could meet at the North Pole and/or the South Pole. Perpendicular lines meet at a right angle.
Not necessarily. They could be skew lines, and satisfy these conditions.
No. They could be parallel.