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Definition and properties of a cube.

Finding the midpoint of a line segment given the coordinates of the endpoints

A helpful scientific calculator that runs in your web browser window.

The site gives a small applet exploring the relationship between circles centered at the origin, linear equations, and pythagorean triples.

Definition of 'Angle Bisector' and a general discussion of bisection. Link to 'line bisector'

This page discusses the different types of lines in geometry, including medians, bisectors, rays and more.

Definition of collinear points - three or more points that lie in a straight line

Great (and short)Powerpoint Presentation on Points, Lines, and Planes.

Definition of a transversal. A line that cuts across two or more (usually parallel) lines. Also perpendicular transversal

The Protractor described. Dual scales, baseline and origin.

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