Difference between revisions of "Locus Tool"
From GeoGebra Manual
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<noinclude>{{Manual Page}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> | <noinclude>{{Manual Page}}[[Category:Manual (official)|{{PAGENAME}}]]</noinclude> | ||
| − | + | {{Tool|icon=Tool.png|name={{PAGENAME}}|type=special line|icon=Tool_Locus.gif}} | |
| − | {{Tool|icon=Tool.png|name={{PAGENAME}} }} | ||
: 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 see command [[Locus Command|Locus]]). | : 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 see command [[Locus Command|Locus]]). | ||
: Note: Point ''A'' has to be a point on an object (e. g. line, segment/interval, circle). | : Note: Point ''A'' has to be a point on an object (e. g. line, segment/interval, circle). | ||
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::* Place a new point ''A'' on the ''x''-axis (see tool [[New Point Tool|New Point]]; see command [[Point Command|Point]]). | ::* Place a new point ''A'' on the ''x''-axis (see tool [[New Point Tool|New Point]]; see command [[Point Command|Point]]). | ||
::* 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 [[ | + | ::* 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 20:09, 9 June 2010
- 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 see command Locus).
- 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 tool New Point; see command Point).
- 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.
