Parallel lines close parallel lines Lines which never meet and stay the same distance apart. Parallel lines are indicated by a pair of arrows. are two or more straight lines that remain the same ...

THIS work would have been more correctly described as being “by Eugène Roucheé and Ch. de Comberousse, translated and edited by Richard P. Wright,” &c. But, although Mr Wright can lay small claim to ...

In our mind’s eye, the universe seems to go on forever. But using geometry we can explore a variety of three-dimensional shapes that offer alternatives to “ordinary” infinite space. When you gaze out ...