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Math Forum » Discussions » Math Topics » geometry.puzzles.independent

Topic: Rectangle Area
Replies: 11   Last Post: Jan 14, 2010 1:01 PM

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Peter Chang

Posts: 8
From: new zealand
Registered: 7/5/08
Re: Rectangle Area
Posted: Jan 11, 2010 4:23 AM
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Note the fact that triangle ADE is similar to triangle GDC.

Therefore we have:

DG/DC = AD/DE

It can be re-written as:

DG*DE = AD*DC which means that S1 = S2

http://www.idealmath.com/geometrytheorem/similartriangle.htm



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