Title: Missing or Excess Area
Author: Guillermo Bautista

Click the Play button at the bottom-left of the applet to view the animation.

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  1. Click the Pause button and refresh your browser.
  2. What is the area of the square made up of the two triangles and two trapezoids?
  3. Check the Assemble Manually check box to show the slider.
  4. Set the slider external image gif.latex?%5Calpha and external image gif.latex?%5Cbeta to 90, and then a to 0 and e to 8. What is the area of the rectangle?
  5. Explain why there is an excess area.