Friday, February 17, 2012

Algebraic Identity - Square of Sum

This is a Java Applet created using GeoGebra from - it looks like you don't have Java installed, please go to


  1. Very nice idea sir

  2. Sanjay,
    I think the usual way to show this geometrically is to draw it with the b x b square in the upper right hand corner. (In other words, remove points E and D and extend CB to meet QR at D). To me this is clearer. Is there some special reason you put the square in the lower right hand corner?

    1. There is no specific reason for putting b x b there. Point A is a variable point you can drag it with your mouse.

  3. ....but ther is a very good reason to put it where Petersuggests - it makes it clear, obvious and easy, as opposed to arbitary and complicated.

    I like Sanjay's square of difference though.