Difference between revisions of "British Flag Theorem"
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Revision as of 04:10, 21 January 2010
The British flag theorem says that if a point P is chosen inside rectangle ABCD then .
The theorem also applies to points outside the rectangle, although the proof is harder to visualize in this case.
Proof
In Figure 1, by the Pythagorean theorem, we have:
Therefore:
This article is a stub. Help us out by expanding it. The above result i.e. theorem holds true even if the point P is selected on the boundary of rectangle or even outside the rectangle.