Therefore
20 If two solids be alike, they have their sides proportionalls, and two meane proportionalls 21 d vij, 19. 21. p viij.
It is a consectary out of the [5 e xxij]. But the meane proportionalls are made of the sides of the like solids, to wit, of the second, third, and fourth: Item of the third, fourth, and fifth, as here thou seest.
| 2, | 3, | 5, | 4, | 6, | 10. |
| 30, | 60, | 120, | 240. | ||
Of Geometry the twentie fourth Book. Of a Cube.
1 A Rightangled parallelepipedum is either a Cube, or an Oblong.
2 A Cube is a right angled parallelepipedum of equall flattes, 25. d. xj.
As here thou seest in these two figures.