| Some C.a.R.
activities use some special buttons to add to the interactivity. This is what
they do. |
| |
| |
The cursor keys move
the whole display left, right, up and down, and the + and - keys zoom in and
out. |
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|
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Replay a
construction. Return to first step. |
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Replay a
construction. Go to next step. |
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Replay a
construction. Go to last step. |
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Moves a point.
|
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A free, movable
point. Can be fixed immediately by holding down the shift key.
|
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A straight line
through two points. |
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A line segment
between two points. |
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The parallel
line to a line through a point. |
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The line
perpendicular to a line through a point. |
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A circle around
a point through another point. |
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Circle around a
point with a radius equal to the distance of two other points. The
midpoint is chosen as last point. |
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Middle point
between two points. |
|
The
intersection between two lines, a line and a circle, or two circles.
Either the two objects (generates both intersection points), or one of the
intersection points (if there are two) can be selected. |
 |
Filled polygon.
The last point must be selected twice to stop the selection. |
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The track of a
point when another point is moved. First selection determines the point to be
tracked. The moving point is dragged with the left mouse button. |
 |
Automatic track
of a point when another point is moved on an object (line or circle). First
selection determines the point to be tracked. The animation can be stopped by a
mouse click. |
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Run a
macro. Shift click selects the previously run macro. |
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Deletes the
last construction step. |
