The other streets run at right angles to one another.
In the second class there are, in addition to the lifting motion, two horizontal movements at right angles to one another.
I can't stand all the right angles in here, by the way.
Other elements of the problem there are none, except mere numbers and angles, which do not depend upon the fundamental measurements of space, time and mass.
It may be asked, Why can God not create a triangle whose three angles shall not be equal to two right angles?