Geometry section of

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Tangents and Circles (definition, common tangents, theorems)
Rules for Chords, Secants, Tangents (formulas for segments)
Angles and Circles (central, inscribed, tangent chord, 2 chords, 2 secants, 2 tangents, secant-tangent)
For constructions involving circles see Constructions.


REFRESHERS: (while these topics are mostly "review", you may also find new information here)
Basic Circle Information (parts of circles, )

EXTRAS: (interesting information - not necessarily appearing on assessments)
Power of a Point Theorem (under construction)

Geometer's Sketchpad: (version 4.0+) Located at