Title | Description | Thumbnail Image | Curriculum Topics |
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## Why Do Rivers Meander? |
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## DescriptionRivers twist and turn as they make their way to the sea. Why does this happen and how can this be explained mathematically? In this module we look at the geometry of meandering rivers. In the process we'll discover some fascinating numerical relationships. |
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## Halloween Math Activities |
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## DescriptionTurn the Halloween season into an opportunity to do some math activities! In this module, you'll find a clever collection of arithmetic, algebra, and geometry activities. |
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## Definition--Circle Concepts--Arc Length |
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## Definition--Circle Concepts--Arc LengthThis is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics. |
Definition of a Circle | |

## Definition--Circle Concepts--Area of a Circle |
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## Definition--Circle Concepts--Area of a CircleThis is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics. |
Definition of a Circle | |

## Definition--Circle Concepts--Center of a Circle |
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## Definition--Circle Concepts--Center of a CircleThis is a collection of definitions related to circles and related topics. This includes general definitions for parts of a circle, constructions involving circles, and other topics. |
Definition of a Circle | |

## Definition--Circle Concepts--Chord |
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## Definition--Circle Concepts--Chord |
Definition of a Circle | |

## Definition--Circle Concepts--Circle |
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## Definition--Circle Concepts--Circle |
Definition of a Circle | |

## Definition--Circle Concepts--Circle Inscribed in a Square |
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## Definition--Circle Concepts--Circle Inscribed in a Square |
Definition of a Circle | |

## Definition--Circle Concepts--Circle Inscribed in a Triangle |
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## Definition--Circle Concepts--Circle Inscribed in a Triangle |
Definition of a Circle | |

## Definition--Circle Concepts--Circles on a Coordinate Plane |
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## Definition--Circle Concepts--Circles on a Coordinate Plane |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Arc |
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## Definition--Circle Concepts--Circular Arc |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Composite Figures |
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## Definition--Circle Concepts--Circular Composite Figures |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Cross-Sections |
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## Definition--Circle Concepts--Circular Cross-Sections |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Functions |
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## Definition--Circle Concepts--Circular Functions |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Models |
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## Definition--Circle Concepts--Circular Models |
Definition of a Circle | |

## Definition--Circle Concepts--Circular Numerical Models |
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## Definition--Circle Concepts--Circular Numerical Models |
Definition of a Circle | |

## Definition--Circle Concepts--Circumcenter of Triangle |
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## Definition--Circle Concepts--Circumcenter of Triangle |
Definition of a Circle | |

## Definition--Circle Concepts--Circumference |
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## Definition--Circle Concepts--Circumference |
Definition of a Circle | |

## Definition--Circle Concepts--Circumscribed Angle |
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## Definition--Circle Concepts--Circumscribed Angle |
Definition of a Circle | |

## Definition--Circle Concepts--Concentric Circles |
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## Definition--Circle Concepts--Concentric Circles |
Definition of a Circle | |

## Definition--Circle Concepts--Diameter |
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## Definition--Circle Concepts--Diameter |
Definition of a Circle | |

## Definition--Circle Concepts--Equation of a Circles |
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## Definition--Circle Concepts--Equation of a Circles |
Definition of a Circle | |

## Definition--Circle Concepts--Hexagon Inscribed in a Circle |
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## Definition--Circle Concepts--Hexagon Inscribed in a Circle |
Definition of a Circle | |

## Definition--Circle Concepts--Incenter of a Triangle |
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## Definition--Circle Concepts--Incenter of a Triangle |
Definition of a Circle | |

## Definition--Circle Concepts--Inscribed Angle |
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## Definition--Circle Concepts--Inscribed Angle |
Definition of a Circle |