T
H
E

E
L
E
M
E
N
T
S
Book I   Proposition 23
Therefore
    the rectilineal angle FAG equal to the given rectilineal angle DCE has been conctructed on the given line AB and at the given point A on it.

This being the very thing it was necessary to do.
Previous Page    Return to Propositions    Seq.3 Next: I.31