Clavius, Christoph
,
Geometria practica
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LIBER QVARTVS.
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9082689 {1/16}. </
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<
s
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xml:space
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">maius ſit, quam 9082321. </
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<
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xml:space
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">Igitur AB, ad BH, minorem proportio-
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nem habebit, quam 3013 {3/4}. </
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<
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<
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xml:space
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<
s
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xml:space
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"> erit AB,
<
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note
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nor quam 3013 {3/4}.</
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<
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<
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rurſus angulo HAB, bifariam per rectam AI, ſecantem HB, in N;
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</
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<
s
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xml:space
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">erunt vt prius, triangula BIN, AIB, æquiangula. </
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<
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xml:space
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">Ergo, vt ſupra, demonſtrabi-
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mus, vtramque BA, AH, ſimul ad HB, habere eandem proportionem quam AI,
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ad IB. </
s
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<
s
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xml:space
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">Eſt autem BA, oſtenſa minor, quam 3013 {3/4}. </
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<
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xml:space
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">& </
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<
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">AH, minor, quam 2911. </
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<
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">& </
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<
s
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<
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ob id earum ſumma minor, quam 5924 {3/4}. </
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<
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xml:space
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">ipſa autem HB, poſita eſt 780. </
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xlink:label
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xml:space
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">8. quinti.</
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tur vtraque BA, AH, ſimul ad HB, hoc eſt, AI, ad IB, minorem habebit propor-
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<
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xlink:label
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">10. quinti.</
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tionem, quam 5924 {3/4}. </
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<
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<
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<
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xml:space
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"> erit AI, minor, quam 5924 {3/4}. </
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<
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xml:space
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">Et quoniam eſt, vt 5924 {3/4}. </
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<
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xml:space
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">ad 240, quod idem nu-
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merus fiat ex primo in quartum, qui ex ſecundo in tertium, quæ quidem pro-
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portio denominatur à 7 {143/240}. </
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<
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xml:space
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">habebit quoque AI, ad IB, minorem proportio-
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nem, quam 1823. </
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<
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xml:space
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<
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">ideoque poſita I B, 240. </
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<
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xml:space
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"> erit A I,
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quam 1823. </
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<
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xml:space
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">atque ob id quadratum ipſius A I, minus, quam 3323329. </
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<
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ſi addatur quadratum 57600. </
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<
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xml:space
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">ipſius IB, fiet quadratum ipſius AB, (quod
<
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xml:space
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">47. primi.</
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dratis rectarum A I, IB, æquale eſt) minus quam 3380929. </
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<
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xml:space
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">eiuſque radix pro-
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pterea, vel recta AB, minor quam 1838. </
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<
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<
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">cum huius quadratum 3381252 {37/121}.
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</
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<
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<
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xml:space
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"> Igitur AB, ad BI, minorem proportionem
<
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quam 1838 {9/11}. </
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<
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<
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">ac proinde poſita BI, 240. </
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<
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"> erit A B, minor,
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1838 {9/11}.</
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<
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<
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item angulo IAB, bifariam per rectam AK, oſtendemus eodem mo-
<
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do, vtramque BA, AI, ſimul ad IB, habere eandem pro portionem, quam AK, ad
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KB. </
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<
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">Sunt autem BA, AI, ambæ ſimul minores, quam 3661 {9/11}. </
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<
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tenſa ſit minor, quam 1838 {9/11}. </
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<
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<
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<
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<
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">IB, poſita eſt 240.
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</
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<
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<
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<
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