GeoGebra
    • circle geometry
    • 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
GeoGebra

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

Discover Resources

  • UCSS Math I 3.1.2 Example 1
  • AbwicklungVieleck03
  • Bisector
  • Euler Line
  • denney#4

Discover Topics

  • Cube
  • Variance
  • Arithmetic Mean
  • Rhombus
  • Pyramid

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