Difference between revisions of "Two Tangent Theorem"
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From a simple application of the [[Power of a Point Theorem]], the result follows. | From a simple application of the [[Power of a Point Theorem]], the result follows. | ||
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[[Category:Geometry]] | [[Category:Geometry]] | ||
Revision as of 17:55, 13 March 2012
The two tangent theorem states that given a circle, if P is any point lying outside the circle, and if A and B are points such that PA and PB are tangent to the circle, then PA = PB.
<geogebra>4f007f927909b27106388aa6339add09df6868c6</geogebra>
Proofs
Proof 1
Since 
and 
are both right triangles with two equal sides, the third sides are both equal.
Proof 2
From a simple application of the Power of a Point Theorem, the result follows.
