And here observe, That Bisecare, doth here, and in other places following, signifie to cutte a thing into two equall parts or portions; And so Bisegmentum, to be one such portion; And Bisectio, such a like cutting or division.
30. Rounds of equall diameters are equall. Out of the 1. d. iij.
Circles and Spheares are equall, which have equall diameters. For the raies, which doe measure the space betweene the Center and Perimeter, are equall, of which, being doubled, the Diameter doth consist. Sn.
The fifth Booke, of Ramus his Geometry, which is of Lines and Angles in a plaine Surface.
1. A lineate is either a Surface or a Body.
Lineatum, (or Lineamentum) a magnitude made of lines, as was defined at [1. e. iij]. is here divided into two kindes: which is easily conceived out of the said definition there, in which a line is excluded, and a Surface & a body are comprehended. And from hence arose the division of the arte Metriall into Geometry, of a surface, and Stereometry, of a body, after which maner Plato in his vij. booke of his Common-wealth, and Aristotle in the 7. chapter of the first booke of his Posteriorums, doe distinguish betweene Geometry and Stereometry: And yet the name of Geometry is used to signifie the whole arte of measuring in generall.
2. A Surface is a lineate only broade. 5. d j.
