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January 25, 2015

January 25, 2015

Posted by **Bijay** on Wednesday, October 31, 2012 at 12:06pm.

- Math -
**Steve**, Wednesday, October 31, 2012 at 12:23pmI assume you know how to construct a line perpendicular to a given line.

On line AB, mark off 4 units. Construct a perpendicular at those endpoints.

Mark off the same 4 units on each perpendicular. Label those points C and D.

Connect C and D for the 4th side

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