Viviani, Vincenzo, De maximis et minimis, geometrica divinatio : in qvintvm Conicorvm Apollonii Pergaei
page |< < (121) of 347 > >|
145121 rectangulum AKF ad rectangulum DKE, vt quadratum AK ad KD (ob la-
terum
proportionalitatem) vel vt quadratum IO ad OE (ob triangulorum
AKD
, IOE ſimilitudinem) vel vt rectangulum IOL ad EOM (ob homolo-
gorum
laterum proportionalitatem) erit, ex æquali, rectangulum GKH,
vel
quadratum GK ad rectangulum DKE, ſiue vt rectũ latus Ellipſis GEHD
ad
eiuſdem tranſuerſum, vt rectangulum POQ, ſiue quadratum PO, ad re-
ctangulum
EOM, vel vt rectum Ellipſis PMQE ad ipſius tranſuerſum:
cum
ergo
huiuſmodi Ellipſes habeant latera proportionalia, ſintque æqualiter
116. ſec.
defin
. h.
inclinatæ, erunt inter ſe ſimiles.
Quod erat primò demonſtrandum.
111[Figure 111]

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