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Move a point by clicking and dragging. |
 |
Add a point, by moving to the position you want a point and
clicking (or by pressing then dragging then releasing).
|
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Construct a line through two points by clicking then dragging
then clicking.
|
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Construct a perpendicular to a line by first selecting a point
and a line (but not a segment of a line!)
|
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Construct a parallel to a line by first selecting a point and a
line (but not a segment of a line!)
|
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Construct the midpoint by dragging between two
points |
 |
Use the compass to draw a circle by clicking first where the
centre is, then where the circumference is and last where you want this circle
positioned.
|
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Undo your last step - and the step before that, and so
on... |
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Give a hint |
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Clear everything and start again. |
