aamtinc – Resources – GeoGebra

Morphing a rectangle
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Top Drawer Teachers: Geometry
Book
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Tangents and Secants
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Intersecting Chords
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Intersecting Circles
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The Angle Between a Tangent and a Chord
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Tangents from an External Point
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The Angle Between a Tangent and a Radius
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Tests for Cyclic Quadrilaterals (3)
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Tests for Cyclic Quadrilaterals (2)
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Tests for Cyclic Quadrilaterals (1)
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Angles of Cyclic Quadrilaterals
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Angles in the Same Segment
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The Angle in a Semi-Circle
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Angles at the Centre and Circumference
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Lines from the Centre
Activity
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Properties of Chords and Angles
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Linking Angles
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An Angle in the Bend
Activity
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The Angle Sum of a Triangle
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