Planetcalc
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http://planetcalc.com/  


Anton Egoshin  
More than a hundred free calculators on math topics ranging from area of a triangle by its coordinates to total squares (the number of squares in given rectangles). Categories of others include date and time, health, computers, engineering, finance, navigation, unit conversions, and physics. Register by contributing your own using the site's JavaScript calculator editor. Planetcalc welcomes descriptions, translations, and requests. Also available in Spanish and Russian.  


Levels:  Middle School (68), High School (912), College 
Languages:  English, Spanish 
Resource Types:  Calculators, Web Interactive/Java 
Math Topics:  Basic Algebra, Linear Algebra, Arithmetic/Early Math, Differential Equations, Discrete Math, Euclidean Plane Geometry, Number Theory, PreCalculus, Probability/Statistics, Applications/Connections 
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