Squaring A RectanglePi Logo

To squaring a rectangle means to construct a square with an area equal to the area of a given rectangle. You may square a rectangle using only a compass and a straight edge in the following activity. (The proof may be found in [1, p.51].)

    Squaring A Rectangle
  1. Start with rectangle ABCD.
  2. Extend side AB.
  3. Draw an arc centered at B with radius BC. Let E be the intersection of the arc and ray AB.
  4. Construct the midpoint M of segment AE.
  5. Construct a circle centered at M with radius OA.
  6. Extend side CB.
  7. Let F be the point where the circle and ray CB intersect.
  8. Then BF is the side of the desired square. Complete by constructing a square with side BF.

This has been done on Geometer's Sketchpad. To see this relationship between a square and a rectangle click on squaring a rectangle sketch.

If you have your own rectangle that you wish to square, you may use the squaring a rectangle script.

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Created: March 1996 ---- Last Modified: July 6, 1997

Copyright © 1996-1997 Michael D. Huberty, Ko Hayashi & Chia Vang