Therefore
3 The sides of a cube are 12. the plaine angles 24. the solid 8.
Therefore
4 If sixe equall quadrates be joyned with solid angles, they shall comprehend a cube.
As here in these two examples.
Therefore
5 If from the angles of a quadrate, perpendiculars equall to the sides be tied together aloft, they shall comprehend a Cube. è 15 p xj.
It is a consectary following upon the former consectary: For then shall sixe equall quadrates be knit together: