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GeoGebraGeoGebra Classroom

6.1.4 Practice

Use the pen tool to circle all figures that are parallelograms.

For each figure you did not circle above:

  • Identify it by its letter.
  • Explain how you know it is not a parallelogram.

2) Decompose and rearrange this parallelogram to make a rectangle. The shapes and point are moveable.

What is the area of this parallelogram? Explain your reasoning. Feel free to use the pen tool (in the custom app above) to help support your explanation.