6 The diagony of a Cube is of treble power unto the side.
For the Diagony of a quadrate is of double power to the side, by the [12 e, xij]. And the Diagony of a Cube is of as much power as the side the diagony of the quadrate, by the same e. Therefore it is of treble power to the side.
7 If of foure right lines continually, proportionally the first be the halfe of the fourth, the cube of the first shall be the halfe of the Cube of the second è 33 p xj.
It is a consectary out of the [25 e, iiij]. From hence Hippocrates first found how to answer Apollo's Probleme.
8 The solid plaine of a cube is called a Cube, to wit, a solid of equall sides. 19, d vij.
Therefore
9 It is made of a number multiplied into his owne quadrate.
So is a Cube made by multiplying a number by it selfe, and the product againe by the first. Such are these nine first cubes made of the nine first Arithmeticall figures.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Latera. |
| 1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | 81 | Quadrates. |
| 1 | 8 | 27 | 64 | 125 | 216 | 343 | 512 | 729 | Cubes. |