because the world would explode
If none of the sides ever cross each other, there cannot be a closed plane figure.
The NEVER cross each other
Well, isn't that a happy little question. You see, contour lines represent points of equal elevation on a map. If two contour lines were to cross, it would mean that the same point on the map is at two different elevations, which just doesn't happen in nature. So, we let each contour line peacefully hold its own space, creating a clear and beautiful representation of the landscape.
parallel lines
because the world would explode
they do not cross each other
Contour lines can never touch each other, and they can never just stop, they have tonot go off the page or connect.
One contour can not cross another because a contour is one exact elevation; if it crossed another contour it would show that it is higher than the second contour on one side, but lower on the other side.
If none of the sides ever cross each other, there cannot be a closed plane figure.
The NEVER cross each other
Well, isn't that a happy little question. You see, contour lines represent points of equal elevation on a map. If two contour lines were to cross, it would mean that the same point on the map is at two different elevations, which just doesn't happen in nature. So, we let each contour line peacefully hold its own space, creating a clear and beautiful representation of the landscape.
No, parallel actually means that the lines will never touch or cross
parallel lines
No, parallel lines never meet or cross each other.
The electric liens of forces always emit from positive charge and do not cross each other because they are Carry same charges and the repel each other.
The answer would be parallel lines these lines never meet or cross each other.