This page uses JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright © 1990-2001 by KCP Technologies, Inc. Licensed only for non-commercial use.
Once the applet loads, drag the red point labeled She (Sheila) until it coincides with the point labeled He (Herman). The two are together when they hear the train whistle. Click the Animate She button to see what happens next. You may also drag Sheila toward the right without the animation.

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