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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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ARCMIMETRICA DICTAMINA
rentia rectis aequalibus utrinque subten-
duntur, arcus ipsi etiam aequales sunt.
b. c. eodem graduum es minutorum nu-
mero, non tantum: sed eadem eriam
extensione, gaudent.
CONDTOTAMEN II.
Circulorum inter se aequalium, aequalibus-
que rectis suotensorum, aequalia sune
Sesmenta es Sectores, ipsis respondentes.
Scholion.
Subcensa cerei areus circuli FIG. 7. ADFBR A.
nim. arcuS DF B. recta est DB. Sesmenium cir-
cuti, e quidem minus hinc est portio DFBD.
e inde majus BE. ADB. Sed Sector eADCIBED.
binis radtiis de arcu intercepto detinitus.
Ec dimidia subcensa B C. Sinus dicitur dimi-
dii illius arcus, nempe arclis BF. Omnis ereo
Sinus est dimidia subrenta arcus dupli.
CON DIOTAMEN III.
Si subtensae duae inter se aequales circulo-
rum diversorum arcus similes (eodem
graduum es minutorum numero eau
dentes) intercipiunt; equales sunt bi duo
circuli sectores etiam, ut es sermenta
utrobique sunt aequalia.
a
DICiTA