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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
# Folio - , page id 806933011:0686
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OsIlium, and is inserre d eo alt che Pranerte Pro-
cesses of the Vertebrae oF the Loins interitals, under
che esoas Muscle. This like cho. Musculus Rectus
Abdominis, cirher mores the Vetebrae oF the Loins
In
RD +OS+LLON.
Duadrilateral Figure inscribed in a CHcle
nearer The Os Ilium lareralir, Wvten Wve are Aand- (a5 a b c d) the Rescansle under the LWO DIaSO
ins e voh Less trm, or else mores chc Os Elium nals (a c and b d) is equal to boch the Rectanele
rearer che Caid Verrebrae on che comprary side, vollen
Wwe stand upon one Legontr.
OOADRIGEMINT, accordins r0 some Ana
comiltsare four lmall Muscles chaccurm che ThigH
corvara che outside, and are placed uron che APri-
culation, or jointins OE the LCh one by ano-
OOADRTLATERAS Fisures, ale LIIC whole
Angles; and chey are cicher P’arallelosram, Trape-
Zium, Rectanste, Square, Rhombus, Rhomboides.
Parallelogram, i5 a Duadrilaterat Lisure, whole
Spebside Sides are Parallet and Fgual.
made by the oppol s et c LGues OX
du and b c X a d.
ThaciS, a CXBd = b CX a d. F BaX Cd. Mahe
che AnSIe ab c =  da.
D E M ONS FR A FFON
Eher.
Sides are Four righe Lines, and those makeins tour
Trapezium, 15 2
drilaterat Pisure, wihol
Sides are unequal, a5 in
Chis LIGDEC.
Rectansle, 15 2 P
rallelogram, W
Angles are Lisncand
15 al0 Caseu 2 Rect.
L. Jhe Priansles a b d and b ce will be simi-
lat; For L b d a is equal ro the v bca, (Beins in
the Pame Scoment) and the L a b d == L cb c, by
the Addirion ot the common Ansle eb a, 10 ehe
trvo equal ones a b e and d b c.
Then will bc: c e:: b d: d a. and consequent.
1Y b0X d a = c e X b d. Thac is, the Rectangle
under che opposite Sides a d and b c, is equaltothe
Segment ec mulciplied by rhe Diasonal b d.
2. The Triangles a be and cb d are Similar,
because che L a be = L cb d (by construction)
and che L b a  = L b d c, beins in che lame deB.
Meut.
Theretore ac: ab: : c d: b d.
Consequenty a c X b d = ab X cd. ThaE 1S,
ie under theremainins Sesment ac, and che
former Diagonal b d = L under the opposire sides
ab and cd.
BREAC= ac - F c0.
ansled Paralleloeram
Square, i5 a Ouadrilate-
ral Figure, having its HH
eles Righe, and che Sides
al Parallel and Equal,
in che FiBure.
Rhombus. Is 2 Parallelo-
ram, tavins ies oppote
ansles and al irs Sides e
qual, as in chis FiBure.
Rhomboides, 152
Parallelorram, H2
ving neicher i
Ansles nor Sides
all equal.
Wherere aln du =DkabAV.
F. L
e2 02O