A deceptively simple question setup leads to a number of attack methods and a surprisingly sophisticated solution set in this open-ended problem. Young geometers of different strengths can go about defining the solutions graphically,...

Everyone loves a good mystery ... can your class actually solve one? Partnered pupils take on the role of forensic investigators during a three-part activity focusing on DNA evidence processing. Learners discover the methods used to...

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."

Loci are applied to word problems in this online tutorial. Practice problems are included. The teacher resource page supplies practical problems.

This tutorial has students investigate the second of the locus theorems. Click on the "Topic Index" link to find related practice activities and resources.

Use this site to learn about the fourth locus theorem regarding parallel lines. Click on the "Topic Index" link to find related practice activities and resources.

The fifth theorem of loci is investigated on this site. Click on the "Topic Index" link to find related practice activities and resources.

This site defines a locus and introduces five theorems about loci. Click on the "Topic Index" link to find related practice activities and resources.

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.

Ellipse as a locus of points using Cabri Jr.

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.

This BBC Bitesize focuses on constructions and locus. To understand this activity, you must already know how to define perpendicular, bisect, and locus.

This StudyCards stack enables students to review concepts in algebra, arithmetic, and geometry, in preparation for the Math A Exam held in New York. They solve problems involving scientific notation, factoring, linear equations, rate of...