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# Title: Leibniz-Handschriften zur Mathematik LH 35, 12, 1
# Folio 69v, page id 00068194:0138
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secunda primi
dur
Ad datum,A rponere datae
rectae BC aequalem rectam AG.
solutio: jungatur AC super qua triangulum
aequilaterum construatur AKD per 1. 1.
centro AC radio  CB describatur dcta versus C
circumferentia BE cui recta per D Clocurret
in E (per Lemma sequens) centro
D radio DE describatur circulus, cui
pro recta per DA occurrent in G
AG = B(per idem temma 
ErgoA G = BC
demonstratio
DE CE~CD Erp DE =DC+ CE =
CB E DCD CBA DCFCE = DE=DG
= DA + AG = DC + AG. Ergo AG = CE = BC
Lemma
si recta DC cujus terminus est centrum (S..dC
circuli producatur versus centrum C
occurret circumferentiae excent
ad partes centri occurret circum ferentrae
uaC
alicubi in E. produci enim potest, in in
eoga aliquando erit extra circulum prius ergo
in circumferentia ex natura continuorum, rade
de qua ad 1. imi.
3tia primi ex his clara est, ita
ut nihil opus sit addi.