bere proportionem, quam &longs;pacium gh ad <expan abbr="dictã">dictam</expan> <lb/>
figuram, hoc modo demon&longs;trabimus.</s> </p>

<p type="main"> <s id="s.000347">Intelligatur circulus, uel ellip&longs;is x æqualis figuræ rectili<lb/>
neæ in gh &longs;pacio de&longs;criptæ. </s> <s id="s.000348">& ab x con&longs;tituatur conus, uel <lb/>
<figure id="id.023.01.037.1.jpg" xlink:href="comma_centr_023_la_1565/023-01-figures/023.01.037.1.jpg"/><lb/>
coni portio, <expan abbr="altitudin&etilde;">altitudinem</expan> habens <expan abbr="eand&etilde;">eandem</expan>, <expan abbr="quã">quam</expan> cylindrus uel cy<lb/>
lindri portio ce. </s> <s id="s.000349">Sit deinde rectilinea figura, in qua y <expan abbr="ead&etilde;">eadem</expan>, <lb/>
quæ in &longs;pacio gh de&longs;cripta e&longs;t: & ab hac pyramis æquealta <lb/>
con&longs;tituatur. </s> <s id="s.000350">Dico <expan abbr="con&utilde;">conum</expan> uel coni portione x pyramidi y <expan abbr="æ-qual&etilde;">æ<lb/>
qualem</expan> e&longs;&longs;e. </s> <s id="s.000351">ni&longs;i enim &longs;it æqualis, uel maior, uel minor erit.</s> </p>

<p type="main"> <s id="s.000352">Sit primum maior, et exuperet &longs;olido z. </s> <s id="s.000353">Itaque in circu<lb/>
lo, uel ellip&longs;i x de&longs;cribatur figura rectilinea; & in ea pyra<lb/>
mis eandem, quam conus, uel coni portio altitudinem ha<lb/>
bens, ita ut portiones relictæ minores &longs;int &longs;olido a, quem<lb/>
admodum docetur in duodecimo libro elementorum pro<lb/>
po&longs;itione undecima. </s> <s id="s.000354">erit pyramis x adhuc pyramide y ma<lb/>
ior. </s> <s id="s.000355">& quoniam piramides æque altæ inter &longs;e &longs;unt, &longs;icuti ba<lb/>
<arrow.to.target n="marg46"/><lb/>
&longs;es; pyramis x ad piramidem y eandem proportionem ha<lb/>
bet, quàm figura rectilinea x ad figuram y. </s> <s id="s.000356">Sed figura recti