A cuboid has 6 faces, 12 edges and 8 vertices which all meet at right angles.
2
I'm pretty sure it is 12 pairs of parallel lines.
It is possible for all nine lines to be perpendicular to at least one other line.
Each of the eight line segments is perpendicular to 2 line segments. So there are 8 pair in all.
how many sets of parallel lines are in a triangle
2
I'm pretty sure it is 12 pairs of parallel lines.
It is possible for all nine lines to be perpendicular to at least one other line.
Yes: three sets of four.
Three sets of four each.
3 sets of four mutually parallel lines.
4, one set at each corner.
There is only one set of perpendicular lines in a right triangle; the horizontal line and the vertical line that make it 90 degrees.
rhombus
Each of the eight line segments is perpendicular to 2 line segments. So there are 8 pair in all.
A diamond shape, or rhombus, has two pairs of perpendicular lines. The diagonals of the diamond intersect at right angles, creating four right angles at the intersection point. Thus, while there are two sets of diagonals, the key perpendicular lines are the diagonals themselves.
Rectangles are made up of 2 sets of parallel lines, which are perpendicular to one another.