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# Title: Erhardi Weigelii Sacrae Caesar. Maiest. ut & Com. Pal. Sultzb. Consiliarii, Supr. Artium Archit. Directoris Saxo Ien. Mathemat. PP. totius Academiae Senioris, Philosophia Mathematica (shelfmarks Leibn. Marg. 65; ZEN Leibn. Marg. 65)
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em n.
altert
netum
artes
tio dit.
tera
hine
rint
clum
CIM.
alem
FF DEVERGENTIS.
ume antecanor
Demonstratio 28 dioli.
Concipiantur supra balin BCi ex utrO
que termino dux perpendiculares BX, CiL
laceribus = les; e duo eli ad balin erune For-
maliter duo recti. Concipiatur postea A. pun-
etum Verticasis anguli constituendi, ubiubi fu-
eric: ee mentali moru inclinari concipiantur
perpendiculares ad se mutuo, donec in puncto
verticali a se mucuo cansant, e ita Triangulum
qualicum constituant: Sane quantum inclinan-
cur perpendicula, de inclinando diminuitur
uterque rectus angulus; tantus collisitur in
puncto intersectionis Llus qui verticem Trian-
suli constiuit. Id quod apparet, si ex iplo
vertice ducatur perpendicularis AV, quae
tanquam auxiliaris, ad id usque punctum
tunc promota concipi potest. Manene igitur
in producto cor ansuli recti, quoc dabantur
veluc in moceria seu caulaemanationis, undehoc
oroductum venit. F. Friangulum habet duos
rectos. Vid. F1B. 24..
Demonstratio r5 oli.
Per dati Trianguli verticem C, ducatur
bas AB. porallela DB. Rt illico patebit, LIum
Frianguli CBA esse = EIOBC R. _ Llum PrIaH-
suli CiAB = LIODCiA: per PrOd.S. C aP. 3. OUF
bus li ee Clus ACB. medius accesserie; consti-
tuenc tres ansuli vicarii, ad idem punctum Cin
cres ansulos (trium interioru ricariO5). FIS. 25.
TA
Lion
t quoqu
tAM
Van
ABB.