Find the Center

Two objects are rotating in space. Are the blue and red shapes centered over one-another?

Test yourself. Try to line them up! Drag the red triangle until it is centered over the blue Square.

When you think you have it right, click the Show/Hide button to reveal a circle around each object. The circles will help to show you how close you are to exact center. How close were you?

The difference in shape, size and the constant movement can really confuse our senses. Click Reset to line them up correctly. Stop/Start the animation as needed.

Java Applet: 1999 Tony Azevedo

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