Valerio, Luca
,
De centro gravitatis solidorvm libri tres
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feras, reliquæ BF, FD æquales erunt; tota igitur FH to
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ti FK æqualis eſt: in triangulo autem AHK recta AF
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ſecat LM, HK parallelas in eaſdem rationes; erit igitur
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LG æqualis ipſi GM; cum igitur æqualium triangulo
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rum ABC, ADE centra grauitatis ſint L, M; erit com
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poſiti ex vtroque centrum grauitatis G. </
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mus, quod proponitur, & ſi baſes prædictorum triangulo
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rum ſint continuæ. </
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PROPOSITIO XXIII.
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les diamet ros in directum inter ſe conſtitutas, ita
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vt vertices ſint extrema ex diametris compoſitæ,
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communem habuerint aliquam ordinatim ad dia
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metrum applicatarum, & vertices cum puncto con
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uenientiæ iungantur rectis lineis: centrum gra
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uitatis v triuſque portionis ijs rectis lineis ab ſciſ
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ſæ, rectam lineam, quæ terminum communem
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diamctrorum, & concurſum parabolarum iungit
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bifariam diuidit. </
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<
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>Circa æquales
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diametros AD,
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DC indirectum
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inter ſe conſtitutas,
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verticibus A, C,
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duæ parabolæ in
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eodem plano
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habeant ali
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quam BD ordi
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