Harriot, Thomas - Mss. 6785

14573

1.) Anguli
[Translation: Trisection of ]

Deliniatio completa pro
3a

b c

, est in 2a
[Translation: A complete delineation for the third

b c

is in the 2nd sheet.
[Commentary: The second sheet is Add MS f. .

Sint quatuor continue proportionales
[…]
erit

a

[Translation: Let there be four continued proportionals.

a

will be threefold.

c g

fit latus trianguli
erit:
1,

b c =

lateri nonanguli
unius circuli.
2,

b c =

lateri nonanguli
duarum revoluti
onum.
3,

b c =

lateri nonanguli
4a
[Translation: If

c g

is the side of the triangle, then:
1.

b c

is the side of a ninth of an angle of one circle.
2.

b c

is the side of a ninth of an angle of two revolutions.
3.

b c

is the side of a ninth of an angle of four revolutions.