Book, Paragraph

 1      I,  4 |      predicable as contained in line. There is evidence for this
 2      I,  4 |      its essential nature (e.g. line thus belongs to triangle,
 3      I,  4 |   belongs to triangle, point to line; for the very being or "
 4      I,  4 |      substance" of triangle and line is composed of these elements,
 5      I,  4 |  formulae defining triangle and line): (2) such that, while they
 6      I,  4 |   straight and curved belong to line, odd and even, prime and
 7      I,  4 |       contains its subject-e.g. line or number as the case may
 8      I,  4 |         in the subject; e.g. in line must be either straightness
 9      I,  4 |    point and straight belong to line essentially, for they belong
10      I,  4 | essentially, for they belong to line as such; and triangle as
11      I,  5 |      perpendiculars to the same line are parallel, it might be
12      I,  7 |      example, that the straight line is the most beautiful of
13      I,  10|         e.g. the definitions of line and straight; common truths
14      I,  10|   falsehood in stating that the line which he draws is a foot
15      I,  10|         being of the particular line of which he speaks, but
16      I,  24|         entity which is neither line, number, solid, nor plane,
17     II,  12|         is analogous to that of line to point, since a process
18     II,  13|        for example, of straight line or circle or right angle.