Difference between revisions of "Locus Tool"
From GeoGebra Manual
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| − | <noinclude>{{Manual Page}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> | + | <noinclude>{{Manual Page|version=4.0}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> |
{{Tool|icon=Tool.png|name={{PAGENAME}}|type=special line|icon=Tool_Locus.gif}} | {{Tool|icon=Tool.png|name={{PAGENAME}}|type=special line|icon=Tool_Locus.gif}} | ||
| − | : Select a point ''B'' that depends on another point ''A'' and whose locus should be drawn. Then, click on point ''A'' to create the locus of point ''B'' (also | + | : Select a point ''B'' that depends on another point ''A'' and whose locus should be drawn. Then, click on point ''A'' to create the locus of point ''B'' (see also [[Locus Command|Locus]] command). |
| − | : Note | + | : {{Note| Point ''A'' has to be a point on an object (e. g. line, segment/interval, circle).}} |
| − | : Example | + | : {{Example| 1=<br /> |
::* Type <tt>f(x) = x^2 – 2 x – 1</tt> into the ''Input Bar'' and press the'' Enter-key''. | ::* Type <tt>f(x) = x^2 – 2 x – 1</tt> into the ''Input Bar'' and press the'' Enter-key''. | ||
| − | ::* Place a new point ''A'' on the ''x''-axis (see | + | ::* Place a new point ''A'' on the ''x''-axis (see [[New Point Tool|New Point]] tool; see [[Point Command|Point]] command). |
::* Create point <tt>B = (x(A), f'(x(A)))</tt> that depends on point ''A''. | ::* Create point <tt>B = (x(A), f'(x(A)))</tt> that depends on point ''A''. | ||
::* Select tool [[Image:Tool_Locus.gif]] and successively click on point ''B'' and point ''A''. | ::* Select tool [[Image:Tool_Locus.gif]] and successively click on point ''B'' and point ''A''. | ||
| − | ::* Drag point ''A'' along the ''x''-axis to see point ''B'' moving along its locus line. | + | ::* Drag point ''A'' along the ''x''-axis to see point ''B'' moving along its locus line.}} |
<!--****[[Locus Tool|Locus]] should be changed to ''Locus'' once icon has been inserted.****--> | <!--****[[Locus Tool|Locus]] should be changed to ''Locus'' once icon has been inserted.****--> | ||
Revision as of 12:54, 16 February 2011
- Select a point B that depends on another point A and whose locus should be drawn. Then, click on point A to create the locus of point B (see also Locus command).
- Note: Point A has to be a point on an object (e. g. line, segment/interval, circle).
- Example:
- Type f(x) = x^2 – 2 x – 1 into the Input Bar and press the Enter-key.
- Place a new point A on the x-axis (see New Point tool; see Point command).
- Create point B = (x(A), f'(x(A))) that depends on point A.
- Select tool
and successively click on point B and point A. - Drag point A along the x-axis to see point B moving along its locus line.
