A discussion of a construction through a point outside the circle.
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Ask Dr. Math
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This tutorial studies circles from the basics to the arcs and chords. Everything with circles is covered with detailed explanations and diagrams.
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Think Quest
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This gives an explination of a tangent line to a circle and gives different conjectures. It also gives an interactive sketch pad demonstration.
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The Geometry Center
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Statements of 3 theorems, with a diagram, and an example for each.
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Regents math
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This web page shows an easy to follow process for constructing a line tangent to a circle from a given point on the outside of the circle.
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Sonoma State University, Dr. Steve Wilson
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This page shows the properties of tangents circumscribing a circle and gives users several practice problems with worked solutions.
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Math Warehouse
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This gives step by step instructions on constructing a tangent through a point on a circle includes a JavaSketchpad for interaction.
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To draw a tangent to a circle through a given point on the circle.
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An interactive explanation of the mathematical relationship between two secants that intersect outside the circle. Also explained is the relationship between a tangent and secant that intersect.
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Math Open Reference
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