Investigate parallelograms
Explore this interactive page. The sliders allow you to change the shape of the parallelogram. Watch the measurements as you change its shape. |
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Some facts are always true about every parallelogram.
As you change the shape of the parallelogram what is always true about:
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the opposite sides?
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the opposite angles?
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the diagonals?
Do you notice any other facts that are always true about every parallelogram?
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Open GeoGebra and follow these steps (DOCX 809kB) to create a new applet. |
Explore your applet:
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How does the applet help you to see that the opposite sides are equal?
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What does the applet demonstrate about the opposite angles?
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What can you add to your applet so that it demonstrates that the diagonals have been bisected?