Ruler and Compass Constructions
A typical activity in Geometry classes is to do ruler and compass
constructions. In such a construction one is allowed to draw a
line segment defined by two points and to draw a circular arc defined
by the center of a circle and a point on the circle. One of the
frequently unstated rules is that you must also justify why the points,
lines and curves constructed have the properties you desire of
them. Thus for example the "construction of the perpendicular
bisector of a line segment" involves both given the steps in the
construction and justifying why the line produced must be the desired
This page links to a series of applets constructed with GeoGebra that
walks through classical ruler and compass constructions.
Constructions are allowed to use a technique from a previous
GeoGebra is a GNUed software package for mathematics
The home for the applications is http://www.geogebra.org.
Return to the GeoGebra Applet page.
Return to the
Applets for courses below calculus page.
Return to the Calculus
Last updated By Mike May, S.J.,
September 11, 2008.