Normally, none.
Vertical lines in space run perpendicular to the horizon. The very definition of perpendicular requires that the lines be at right angles to the horizon, so all lines that meet that definition are perpendicular.
Coplanar lines are when all the points sit in one plane. This is something that is commonly used in geometry.
Usually none, but all ten can be perpendicular.
It is possible for all nine lines to be perpendicular to at least one other line.
a triangle, pentagon and that's all i can think of * * * * * A right angled triangle has a pair of perpendicular lines! Likewise, a pentagon can have a pair. A circle, ellipse etc do not.
Coplanar lines are 2 or more lines located on the same plane. Ex.: If you draw 2 or more lines on a graph, they are all coplanar (the plane they are all on is the piece of paper you drew the graph on).
Its Impossible. For there to be a shape where all five lines meet perfectly and there to be two pairs of perpendicular sides, there must three right angles. Alternitavely, you could have 1 pair of perpendicular lines and two rights angles, but certainly not both.
false
Normally, none.
No - perpendicular lines meet at right angles.
No, none are.
Vertical lines in space run perpendicular to the horizon. The very definition of perpendicular requires that the lines be at right angles to the horizon, so all lines that meet that definition are perpendicular.
Coplanar lines are when all the points sit in one plane. This is something that is commonly used in geometry.
Each lateral face is perpendicular to its lateral neighbours so that makes 4 pairs. In addition, opposite lateral faces may be perpendicular, making 6 pairs in all.
Diamonds come in all shapes and sizes, which determine the number of perpendicular lines (assuming you are referring to the edges as the lines) so there is no one number of lines or perpendicular lines on a diamond.
A heptagon can have all 7 lines that are perpendicular to one or both its neighbours.