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Circles

Parametric Equations Of A Circle - By Kader Mula
A Space Survival Game Where One Must Reach Earth, By Making Various Mathematical Calculations. [View Applet]

Tangents To Circles - By Keith Wright
This Applet Demonstrates The Basic Properties Of Tangents To Circles. How A Tangent To A Circle Only Touches The Circle At One Point, The Perpindicular Distance From The Tangent To The Centre Of The Circle Is Equal To The Radius And The Normal Is Always At 90 Degrees To The Tangent. [View Applet]

The Equation Of A Circle - By Brendan Ryan
This Applet Demonstrates That The Eqauation Of A Circle Can Be Found Given Its Centre Point And The Equation Of A Tangent To The Circle. The Equation Of The Circle Will Be Calculated According To The Information Supplied By The User And A Picture Of The Circle Will Appear On A Graph On The Left Hand Side Of The Applet. [View Applet]

To Get The General Equation Of A Circle Given Three Points - By Conor Hamilton
To Get The Equation Of A Circle Given Three Points. [View Applet]

Overlapping Circles And Lines - By Donal Golden
This Applet Allows The User To Draw 2 Circles And A Line. The Applet Reports Whether Or Not The Shapes Overlap And Returns The Relevant Values Used In Calculations. [View Applet]