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

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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
vno
latere,
reliqua
in
@eſtigãtur
.
ctanguli, vel datis eorum proportionibus, vna
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.
44
C
. # A. # AB. # # BC.
59996
. # 92310. # 13? # fit # 20. # ferè.
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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