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# Title: Qua Continentur, Oratio Inauguralis. Mathesis Universalis; sive, Arithmeticum opus Integrum, tum Numerosam Arithmeticam tum Speciosam complectens. Adversus Meibomii, de Proportionibus Dialogum, Tractatus Elencticus (shelfmarks Leibn. Marg. 84:1, Stück 1; Leibn. Marg. 84:1)
# Folio 216, page id 826603459:0262
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Mensuratio
fieurae cujus
vis rectili.
BCC.
AC
CBXB F
De Geodaesta.
ECBXBF. = C BX = BF
Pater isicur unirertm mechodus menturandi Trianculum
ouodvis (sive Rectangulum sire Obculangulum live AcucansU
lum.) Nlempe, a quovis ipsius anculo demissa inlatus oppositum (PrO-
duecum, (iOpus,) perpendiculari; harum rectarum (scil. Perpendi-
cularis, _ dicti lacerio) si altera in alcerius semissem ducatur, prodi-
bit area Trianeuli. Contra vero; Si areae duplum per earum rectarum
alieram dividatur, habetur reliqua: Puta Ei per Balin, Habetur Per
pendicularis sive alticudo; Ci per alcicudinem, habetue ba(is.
Acq; de Priangulis menlurandis hactenus.
lxpolica jam mechodo menlurandi quodris sire Parallelo.
Gramnum Cive Triangulum; eadem opera e ficuras alias recti-
lineas quascunq; menlurare docuimus: Calcem li illud addacue
Figuram quamvis rectilineam vel in Paralleloeramma dividi posse, vel
saliem in Triangula: E.X quorum isitur calculo, provolite tgura
calculus carim innorelcie.
Exlempli gracia. Figurarum appolicarum alcera in eria
Ouadeara de unum Priangulum diridicur; Alcera, in quatuOE
Triangula. Ouxe Cifcorlim menlureneur; illorum aggregatum
priori, horum posteriori ABUrX RquaruE. Acq; eodem prorlus
modo Faciendum exie in figuris quibulris muletansulis, praeler-
Ariandu
cuiusois.
C AP, 24
tim