Cataneo, Girolamo, Hier. Cataneus de arte bellica, sive, de designandis ac construendis arcibus & propugnaculis, necnon & de iis oppugnandis, expugnandis ac propugnandis : de itinere exercitus, ac castrametatione, quando expediat manus cum hoste conserere, 1600

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3123
OPERATIO OCTAVA.
Lineam rectam in aliquot partes æquales
diuidere.
Primò formabimus duos angulos æ quales, vnum in
vna extremitate dictæ lineæ, alterum verò in altera:
idq́;
per primam operationem. Deinde diuidemus vnum-
quodque latus (quorum ope angulos formauimus)
in tot partes in quot volumus diuidere lineam datam,
vnica excepta:
& adhibita regula ducemus lineas, quæ
interſecent lineam datam, ſicq́;
linea data apparebit
diuiſa in tot partes in quot erat à nobis diuidenda.
Exempli gratia, ſtatuamus lineam AB, diuidendam
A -- B,
eſſe in partes octo:
formabimus duos angulos, vnum
in puncto A, qui erit angulus DAB, alterum verò in
puncto B, qui erit angulus CBA, vt in figura apparet.
34[Figure 34]

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