But
as they in theyr theorikes (which ar only mind workes)
do precisely vnderstand these definitions, so it shal be sufficient for those men, whiche seke the vse of the same thinges, as sense may duely iudge them, and applye to handy workes if they vnderstand them so to be true, that outwarde sense canne fynde none erroure therein.
Of lynes there bee two principall kyndes. The one is called a right or straight lyne, and the other a croked lyne.
A streghte lyne. A Straight lyne, is the shortest that maye be drawenne between two prickes.
A crokyd lyne. And all other lines, that go not right forth from prick to prick, but boweth any waye, such are called Croked lynes as in these examples folowyng ye may se, where I haue set but one forme of a straight lyne, for more formes there be not, but of crooked lynes there bee innumerable diuersities, whereof for examples sum I haue sette here.
A right lyne.
| Croked lynes. | ||
 Croked lines. |  |  |
So now you must vnderstand, that euery lyne is drawen betwene twoo prickes, wherof the one is at the beginning, and the other at the ende.