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Book I
Proposition 44
Let the parallelogram
BEFG
be constructed equal to the triangle
C
, in the angle
EBG
which is equal to
D
; [
I.42
]
let it be placed so that
BE
is in a straight line with
AB
;
let
FG
be drawn through to
H
,
and
let
AH
be drawn through
A
parallel to either
BG
or
EF
. [
I.31
]
Let
HB
be joined
.
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