- Book of Numbers (Wikipedia)
The Book of Numbers (from Greek Ἀριθμοί, Arithmoi, lit. ’numbers’; Biblical Hebrew: בְּמִדְבַּר, Bəmīḏbar, lit. ‘In [the] desert’; Latin: Liber Numeri) is the fourth book of the Hebrew Bible and the fourth of five books of the Jewish Torah. The book has a long and complex history; its final form is possibly due to a Priestly redaction (i.e., editing) of a Yahwistic source made sometime in the early Persian period (5th century BC). The name of the book comes from the two censuses taken of the Israelites.
- Regular octahedron (Wikipedia)
A regular octahedron is an octahedron that is a regular polyhedron. All the faces of a regular octahedron are equilateral triangles of the same size, and exactly four triangles meet at each vertex. A regular octahedron is convex, meaning that for any two points within it, the line segment connecting them lies entirely within it.
