Examples of using "Retos" in a sentence and their english translations:
This quadrilateral has two right angles.
The two lines cross each other at right angles.
These two lines cut across each other at right angles.
If a triangle has two right angles, it's a square missing one side.
A square is a quadrilateral with four sides the same and where all four corners are right angles.
But some philosophical people have been asking why three dimensions particularly—why not another direction at right angles to the other three?—and have even tried to construct a Four-Dimensional geometry.
That Space, as our mathematicians have it, is spoken of as having three dimensions, which one may call Length, Breadth, and Thickness, and is always definable by reference to three planes, each at right angles to the others.