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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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antetei
Nquio
tatem
AEidi
tO, a
ta1.
Td
je non
amte-
161Y
emi
Mao
RLECTAROM CARCDLI.
Produerum V.
Incirculo angulo adcentrum BDC,
duplus est Anguli ad periphe
riamBAC.
Demonstratio.
Nam ducta diametro AE noscuntur TF
ansula aequicrura e radiis D A = DC quorum
ansuli ad bales inscriptas, inter se aeguaneur, per
erod. 3. Ciap.  Angulus ad Centrum autem,
externus Friansulorum corum, adeoque inter-
nis uerisque aequalibus simul aequalis, per
Prod. 2. C. 4. h. C. eminscujusque duplus. Vid
390
+
Subdiclamen I. Sap. Div.
in circulo, qui in eodem segmenta sunt an
culi suntenter se aequales. Utrique enim
sunt semisses anculi centralis. Vid
5. 40.
Subdictamen II. Sap. Dir.
Duadrilaterorum circulo in scriptorum; an-
culi opposiei duebus rectis sunt aquales.
Vid. FMClia. pYOD. LZ. lib. 5.
Subdict. TII.
In aequalibus circulis aequales aneuli, aequa
libusperipberia arcubus insisnn ses vi-
sissimo