Tool: The concept of locus  Math Open Reference 


Go to:  http://www.mathopenref.com/locus.html (opens a new window)  
Description:  A web page and interactive applet that illustrate the concept of locus. The applet shows a model of the plane populated with "all" the possible points on the plane. Choosing to highlight those that are all a given distance from a given point, for example, results in a circle. The user can drag the point and change the distance, showing the circle moving and changing size. The text page has a description of the locus concept and links to other loci  a straight line and an ellipse. Applet can be enlarged to full screen size for use with a classroom projector. After use in the classroom, student can access it again from any web browser at home or in the library with no login required. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com. 

Technology Type:  Java Applet  
Author:  John Page  
Language:  English  
Cost:  Does not require payment for use  
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Courses:  Geometry  Points and lines, Construction and loci  
