Title  Description  Thumbnail Image  Curriculum Topics 

Halloween Math Activities 
Turn 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.


Why Do Rivers Meander? 
Rivers 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. Students will learn some basic concepts about the geophysics of how rivers form, but they will focus their analysis on what is called the sinuousity ratio. This is the ratio of the straightline distance of the river and its meandering distance. This ratio reveals important characteristics of the river. Then, students will develop and examine geometric models involving circular arcs and segments to get a better understanding of the ratio. These models will first involve using a compass and straight edge to model a river. This is followed by an algebraic analysis. This module is an excellent way of tying real world concepts to geometry and algebra. The realworld application is easy to understand and yet it reveals a wealth of math concepts to be explored. 

DefinitionCircle ConceptsArc Length 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsArea of a Circle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCenter of a Circle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsChord 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircle Inscribed in a Square 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircle Inscribed in a Triangle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircles on a Coordinate Plane 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular Arc 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular Composite Figures 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular CrossSections 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular Functions 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular Models 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircular Numerical Models 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircumcenter of Triangle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircumference 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsCircumscribed Angle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsConcentric Circles 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsDiameter 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsEquation of a Circles 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsHexagon Inscribed in a Circle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsIncenter of a Triangle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle  
DefinitionCircle ConceptsInscribed Angle 
This 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 examples. Note: The download is a PNG file. Related ResourcesTo see the complete collection of Math Definitions on this topic, click on this Link. 
Applications of Circles, Definition of a Circle 