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  • circle geometry
  • angle proportional to arc
  • angles at circumference
  • concyclic points
  • tangents
  • proof and explanation
  • equidistance
  • exercise
  • links

circle geometry

Author:
R.Verveer, Arthur Lee
Topic:
Circle, Geometry
This is a series of applets for exploring properties of angles in circle.
circle geometry

Table of Contents

  • angle proportional to arc

    • Angle at Center
    • Angle at Center with spreadsheets
    • Arc and Angle
    • eyeball model
    • Spotlight
    • compare angles and arcs
  • angles at circumference

    • Angle at circumference
    • angle at center and circumference
    • Equal angles in circle; various theorems
  • concyclic points

    • mark equal angles
    • vary and mark an angle
    • drag and trace an angle
    • drag and trace an angle with color
    • make 4 points concyclic
  • tangents

    • exploring tangent-chord angle
    • studying tangent-chord angles
    • tangent chord angles
  • proof and explanation

    • explain difference in angles with circle
    • angle at center and circumference proof
  • equidistance

    • equidistant from 2 points
    • equidistant from 3 points
    • task: circumcenter
  • exercise

    • Annulus
    • circles
    • maximize an angle
    • maximum angle explained
    • task: angle and chord
    • task: rectangle length
    • task: chord midpoint
    • task: make center
    • task: make right angle
    • task: make an angle
  • links

    • seeing tangent and chord from an alternate angle
    • Circle Geometry resources in gMath
Next
Angle at Center

Related Topics

  • Angles
  • Congruence
  • Conic Sections
  • Constructions
  • Coordinates

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