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Book I
Proposition 45
Let
DB
be joined
,
and
let the parallelogram
FH
be constructed equal to the triangle
ABD
, in the angle
FKH
which it equal to
E
; [
I.42
]
let the parallelogram
GM
equal to the triangle
DBC
be applied to the straight line
GH
, in the angle
GHM
which is equal to
E
. [
I.44
]
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