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# Title: Leibniz-Handschriften zur Mathematik LH 35, 12, 1
# Folio 70r, page id 00068194:0139
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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 (.. dC
circuli producatur versus centrum C
occurret circumferentiae excent
ad partes centri occurret circum ferentrae
t
hunia C
erga 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.