OUADJAOUT
Posts:
15
From:
Ecole Nationale Polytechnique Dépt SF Lab. LRE
Registered:
7/9/09


On a property of a line intersectiing two tangents of a cercle
Posted:
Jul 9, 2009 4:38 AM


Let (C) a circle . A is a point outside (C). Let (D1), (D2) two tangents issued from A. (D1) is tangent at K and (D2) is tangent at L respectively. Let (D) a straight line passing through A, between (D1) and (D2). The meeting points with (C) are M and N respectively. Let (LP) the parralel at (D) issued from L, where P is the intersection with(C). Prouve that (PK) intersect [MN] at his middle.
M. Ouadjaout ENP,Dépt. SF, Lab. LRE Algeria
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