Clavius, Christoph, Geometria practica

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193163LIBER QVARTVS. Quo ſegmento 6. dempto ex latere B C, 21. remanebit alterum ſegmentum
C
D, 15.
6565[Handwritten note 65]
Verbi gratia. In priori triangulo ABC, ſi differentia 4. inter ſegmentum B D,
6464[Handwritten note 64]6666[Handwritten note 66]6767[Handwritten note 67]&
latus AB, hoc eſt, inter 6. & 10. multip licetur per 16. nempe per ſummam eiuſ-
dem
ſegmenti BD, &
lateris AB; gignetur numerus 64. cuius radix quadrata
8
.
dabit perpendicularem AD. Pari ratione ſi diſſerentia 2. inter ſegmentum
CD
, &
latus AC, hoc eſt, 15. & 17. ducaturin 32. id eſt, in ſummam eiuſdem ſeg-
menti
CD, &
lateris AC: procreabitur numerus 64. cuius radix quadrata 8.
præbebit perpendicularem AD, vt prius.
In poſteriori autem triangulo ABD, ſi differentia 5 {3/8}. inter
ſegmentum
AC, &
latus AD, nimirũ inter 5 {5/8}. & 11. ducatur
124[Figure 124] in 16 {5/8}.
hoc eſt, in ſum̃am eiuſdem ſegmenti AC, & latus AD:
producetur numerus {5719/64}. ſiue 89 {23/64}. cuius radix quadrata
in
numeris exhiberi non poteſt, ſed paulo maior eſt, quãap-
poſita
fractio cuius numerator eſt 75 {94/151}.
denominator aũt 8.

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