Loci & Construction

What is a Locus?

A locus (Plural is loci) is a collection of points that satisfy a given condition or set of conditions.

For example, the locus of points 3 cm from point A is just a circle with radius 3 cm and centre A (see diagram).

Try It!

Use the applet below to play with a virtual Ruler and Set Square to draw parallel and perpendicular lines to the blue line.

Explore!

Use the applet below to learn the 3 steps of constructing the Perpendicular Bisector!

Explore!

Use the applet below to learn the 3 steps of constructing an Angle Bisector!

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Loci for Equidistant to 2 points & Equidistant to 2 rays.