THE appearance of these two little books shows that practical teachers have not yet agreed upon the best method of teaching elementary geometry. That this should be so is by no means a matter for ...

But details about these “dark” elements of the universe remain a mystery. To shed light on these concepts, Euclid will image a wide range of galaxies. Dark matter will have bent the light from ...

The ancient Greek mathematician Euclid proved in his Elements of Geometry that there are only five Platonic solids – the regular tetrahedron (four sides that are equilateral triangles), the cube (six ...