Texas Instruments
Texas Instruments: Ellipse: Locus of Points (Cabri Jr.)
Ellipse as a locus of points using Cabri Jr.
Texas Instruments
Texas Instruments: Conics as a Locus of Points
Students investigate the definition of a parabola through one of its geometric definitions. They study conic sections. They examine an ellipse as a locus of points such that the sum of distances from the foci to the traced path is constant.
Oswego City School District
Regents Exam Prep Center: What Is a Locus?
This site defines what a locus is and offers links to five locus theorems. Walks you through the six "Steps to solving a locus problem."
Oswego City School District
Regents Exam Prep Center: Compound Locus
Loci are applied to word problems in this online tutorial. Practice problems are included. The teacher resource page supplies practical problems.
Oswego City School District
Regents Exam Prep Center: Locus at a Fixed Distance From a Point
This site defines a locus and introduces five theorems about loci. Click on the "Topic Index" link to find related practice activities and resources.
Oswego City School District
Regents Exam Prep Center: Locus Equidistant From Two Points
Use this site to investigate the third theorem of loci, equidistant from two points. Click on the "Topic Index" link to find related practice activities and resources.
Oswego City School District
Regents Exam Prep Center: The Basic Locus Theorems
A wealth of resources for teachers introducing locus theorems to students. Lessons cover simple definitions, provide examples and diagrams, and offer connections to real-life situations. Practice exercises offer students online quizzes...
Wolfram Research
Wolfram Math World: Locus
This site defines the term "locus" as it is used in mathematics and gives an example of the locus as a set of points equal distance from a point in two and three dimensional space.
Math Open Reference
Math Open Reference: Points and Lines
A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.
Wolfram Research
Wolfram Math World: Conchoid of Nicomedes
This site gives an approximate date at which the cochoid was studied by Nicomedes, explains what the locus of points are which make up this curve, and give cartesian and polar coordinates for such a curve, as well as a formula for the...