This page will show you how to calculate various things that pertain to a circle: radius, diameter, circumference, and area.
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WebMath
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This gives step by step instructions on constructing a tangent to a circle through a point not on the circle includes a JavaSketchpad for interaction.
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To draw a tangent to a circle from a given point not on the circle.
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This gives step by step instructions on constructing an arc bisector includes a JavaSketchpad for interaction.
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To bisect a given arc.
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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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Theorems and practice problems
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Math Warehouse
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All you ever needed to know about the tangent of a circle and practice problems.
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Math Warehouse
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All you ever wanted to know about chords and practice problems
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Math Warehouse
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A nice lesson for use on sectors with graphing calculators.
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TI Education: Activities Exchange
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Discusses the properties of chords and inscribed angles of a circle and their geometric relationships. Includes a brief worksheet.
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Algebra Lab
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This gives step by step instructions on inscribing a square in a circle.
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To inscribe a square in a given circle.
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