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Circles (Theorems)
Circle Theorems, Circle Properties, etc...
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Circle Vocabulary
Tangents
Inscribed Angle Theorems & Corollaries
- Inscribed Angle Theorem (V1)
- Inscribed Angle Theorem: Take 2!
- Inscribed Angle Theorems: Take 3!
- Where to Sit? (I)
- Where to Sit (II)?
- Inscribed Angle Theorem: Corollary 1
- Animation 20 (Inscribed Angle Dance!)
- Thales' Theorem (VA)
- Thales' Theorem (VB)
- Inscribed Angle Intercepts Semicircle
- Cyclic Quadrilaterals (IAT: Corollary 3)
- Inscribed Angle Theorems: Take 4!
- Geometric Mean Illustration
Theorems Involving Chords
- Congruent Chords (I)
- Diameters & Chords I (VA)
- Diameters & Chords I (VB)
- Angle Formed by 2 Chords (I)
- Angle Formed by 2 Chords (II)
- Angle Formed by Chord & Tangent (I)
- Angle Formed by Chord & Tangent (II)
- Crossing Chords: Proof Hint
- Congruent Chords Action (A)
- Equidistant Chord Action
- Butterfly Theorem Action!
- Cut-The-Knot Action (2) !!!
- GoGeometry Action 1!
- GoGeometry Action 2!
- GoGeometry Action 3!
- GoGeometry Action 5!
Secant & Tangent Theorems
Older (Earlier) Applets
- Inscribed Angle Theorem (Proof without Words)
- Inscribed Angle Theorem (Corollary 1) (Proof without Words)
- Inscribed Angle Theorem (Corollary 2) (Proof without Words)
- Inscribed Angle Theorem (Corollary 3) Cyclic Quadrilaterals
- Angle formed by a Secant & Tangent: What Do You See? (V1)
- Angle Formed by a Secant & Tangent: What Do You See? (V2)
- Angle Formed by 2 Tangents (V2): What Do You See?
- Cyclic Quadrilaterals
- Congruent Chords in the Same Circle
- Inscribed Angle Theorem (Intro): What Do You See Here?
- Inscribed Angle Action !!!
- Inscribed Angle Action! (2 Theorems)
- Angle Formed by 2 Chords (V1): What Do You See?
- Angle Formed by 2 Chords (V2): What Do You See?
- Chords Equidistant from Circle's Center
- Crossing Chords Property & Proof Start
- Crossing Chords Property & Proof Start (II)