Objects can be related by transformations, so that they will move together. Examples are given of spheres below; other objects may also be used (although such objects may need to be constructed in relation to circles or spheres).
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In the example to the left, three spheres travel together on a segment. Click on the figure to start the animation. These spheres are linked by means of translation.
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On the right, three spheres, linked by rotation, travel together on a circle. Click on the figure to start the animation.
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