Theodosius <Bithynius>; Clavius, Christoph, Theodosii Tripolitae Sphaericorum libri tres

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336324 quadratorum ex reliquis duobus lateribus deſcriptorum, diuidatur per
latus, in quod productum perpendicularis cadit, procreabitur linea ex-
tra triangulum inter perpendicularem, &
angulum obtuſum: Hæc vero
addita baſi conſtituet alteram rectam inter perpendicularem, &
angu-
lum acutum baſis.
PROBL. 6. PROPOS. 10.
DATIS omnibus angulis trianguli non re-
11In triang@
lo non re-
@tãgulo ex
angulis no
tis, vel ex
proportio-
nibꝰ angu
lorum no-
tis, vna cũ
vno latere,
reliqua in
@eſtigãtur.
ctanguli, vel datis eorum proportionibus, vna cũ
vno latere;
reliqua duo latera cognoſcere, & quo-
rumlibet duorum proportionem facere notam.
IN triangulo ABC, ſint primum omnes anguli acuti, & dati; A, grad.
75. Min. 45. B, grad. 67. Min. 23. C, grad. 36. Min. 52. Datum quoq; ſit la-
181[Figure 181] tus AB, 13.
Oportet ex his
reliqua duo latera inueni-
re.
Quoniam eſt, vt ſinus
221. huius. anguli C, ad ſinum anguli
A, ita latus AB, datum ad
latus BC:
ſi fiat, vt ſinus
anguli C, nempe 59996.
ad
96923.
ſinum anguli A, ita
latus AB, datũ 13.
ad aliud,
inuenietur latus BC, 21.
ferè, vt hic apparet.
33
C. # A. # AB. # # BC.
59996. # 96923. # 13? # fit # 21. # ferè.
Item quia eſt, vt ſinus anguli C, ad ſinum anguli B, ita latus AB, datum
ad latus AC:
ſi fiat, vt 59996. ſinus anguli C, ad 92310. ſinum anguli B, ita
latus AB, datum 13.
ad aliud, inuenietur latus AC, fere 20. vt hic vides.
44
C. # A. # AB. # # BC.
59996. # 92310. # 13? # fit # 20. # ferè.
Velquia eſt, vt ſinus anguli A, ad ſinum anguli B, ita latus BC, inuentum
551. huius. ad latus AC:
ſi fiat, vt 96923. ſinus anguli A, ad 92310. ſinum anguli B, ita
latus BC, inuentum 21.
ad aliud, reperietur latus AC, fere 20. vt nic cernis.
66
A. # B. # BC. # # AC.
96923. # 92310. # 21? # fit # 20. # ferè.
SIT deinde angulus B, obtuſus grad. 112. Min. 37. A, grad. 30. Min. 31.
C, grad. 36. Min 52. & rurſum latus AB, 13. Quoniam idem eſt ſinus anguli
B, qui eius complementigrad.
67. Min. 23. vt in tractatione ſinuum demou-
ſtrauimus, inuenietur ratione iam expoſita latus BC, 11.
& AC, 20. fermè.
vt hic liquido conſtat.

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