Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[71. THEOREMA VI. PROPOSITIO VI.]
[72. THE OREMA VII. PROPOSITIO VII.]
[73. THE OREMA VIII. PROPOSITIO VIII.]
[74. THE OREMA IX. PROPOSITIO IX.]
[75. PROBLEMA I. PROPOSITIO X.]
[76. PROBLEMA II. PROPOSITIO XI.]
[77. PROBLEMA III. PROPOSITIO XII.]
[78. PROBLEMA IIII. PROPOSITIO XIII.]
[79. THEOREMA X. PROPOSITIO XIIII.]
[80. THE OREMA XI. PROPOSITIO XV.]
[81. THE OREMA XII. PROPOSITIO XVI.]
[82. THE OREMA XIII. PROPOSITIO XVII.]
[83. THEOREMA XIIII. PROPOSITIO XVIII.]
[84. THEOREMA XV. PROPOSITIO XIX.]
[85. THE OREMA XVI. PROPOSITIO XX.]
[86. THEOREMA XVII. PROPOSITIO XXI.]
[87. THE OREMA XVIII. PROPOSITIO XXII.]
[88. THEOREMA XIX. PROPOSITIO XXIII.]
[89. PROBLEMA V. PROPOSITIO XXIIII.]
[90. THEOREMA XX. PROPOSITIO XXV.]
[91. THEOREMA XXI. PROPOSITIO XXVI.]
[92. THEOREMA XXII. PROPOSITIO XXVII.]
[93. PROBLEMA VI. PROPOSITIO XX VIII.]
[94. THE OREMA XXIII. PROPOSITIO XXIX.]
[95. THEOREMA XXIIII. PROPOSITIO XXX.]
[96. THEOREMA XXV. PROPOSITIO XXXI.]
[97. FINIS LIBRI DE CENTRO GRAVITATIS SOLIDORVM.]
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page |< < (8) of 213 > >|
DE CENTRO GRAVIT. SOLID.
æquidiſtant autem c g o, m n p. ergo parallelogrãma ſunt
o n, g m, &
linea m n æqualis c g; & n p ipſi g o. aptatis igi-
tur K l m, a b c triãgulis, quæ æqualia &
ſimilia sũt; linea m p
in c o, &
punctum n in g cadet. Quòd cũ g ſit centrum gra-
uitatis trianguli a b c, &
n trianguli K l m grauitatis cen-
trum erit id, quod demonſtrandum relinquebatur.
Simili
ratione idem contingere demonſtrabimus in aliis priſma-
tibus, ſiue quadrilatera, ſiue plurilatera habeant plana,
quæ opponuntur.

COROLLARIVM.

Exiam demonſtratis perſpicue apparet, cuius
Iibet priſmatis axem, parallelogrammorum lat eri
bus, quæ ab oppoſitis planis ducũtur æquidiſtare.

THEOREMA VI. PROPOSITIO VI.

Cuiuslibet priſmatis centrum grauitatis eſt in
plano, quod oppoſitis planis æquidiſtans, reli-
quorum planorum latera bifariam diuidit.
Sit priſma, in quo plana, quæ opponuntur ſint trian-
gula a c e, b d f:
& parallelogrammorum latera a b, c d,
e f bifariam diuidãtur in punctis g h _K_:
per diuiſiones au-
tem planum ducatur;
cuius ſectio figura g h _K_. eritlinea
33. primig h æquidiſtans lineis a c, b d &
h k ipſis c e, d f. quare ex
decimaquinta undecimi elementorum, planum illud pla
nis a c e, b d f æquidiſtabit, &
ſaciet ſectionem figu-
5. huiusram ipſis æqualem, &
ſimilem, ut proxime demonſtra-
uimus.
Dico centrum grauitatis priſmatis eſſe in plano
g h K.
Si enim fieri poteſt, ſit eius centrum l: & ducatur
l m uſque ad planum g h K, quæ ipſi a b æquidiſtet.

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