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Two parallelograms (Posted on 2017-08-01) Difficulty: 2 of 5
Point E lies on segment AB, and point C lies on segment FG.
The area of parallelogram ABCD is 20 square units.
What’s the area of parallelogram EFGD?

Source: Alfred S. Posamentier, Math Wonders to Inspire Teachers and Students, 2003.)

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

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Solution GSP | Comment 2 of 3 |
Constructing in Geometer's Sketchpad, regardless of various reconfigurations, situations matching the given construction show the two parallelograms have the same area.
  Posted by Charlie on 2017-08-01 10:11:30
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