T H E
E L E M E N T S 
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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