Sites (15)
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Animated Tangram Tutorial
Flash animation that introduces students to Tangrams and some of their properties.
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Animated Tangram Tutorial
Flash animation that introduces students to Tangrams and some of their properties.
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Congruent Triangles
Build similar triangles by combining sides and angles.
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Fraction Pieces
Create a pattern by combining different shaped blocks.
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Geometry Interactives
Large collection of interactive sites containing Geometry applets.
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Hop's Escher Tiles
Collection of creative tessellations.
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Interactive Pattern Blocks
Use these six common geometric shapes to build patterns and solve problems.
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Isometric Drawing Tool
Use this interactive mathlet to create dynamic drawings on isometric dot paper. Draw figures using edges, faces, or cubes. You can shift, rotate, color, decompose, and view in 3D or 2D.
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Lines in Geometry
You can use the Math•lets that accompany each definition to explore the definitions of the lines and some of their properties.
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Nuts About Geometry
You can learn about the history and uses of geometry, as well as try some fun activities.
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Problems with Tangrams
Students can choose a picture and use all seven pieces to fill in the outline then use tangram pieces to form given polygons.
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Shape Tool
This prototype tool allows you to manipulate different shapes in several ways. You can draw, color, paste, slice, rotate, reflect, expand, and contract.
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Tangram Puzzles
Interactive game where students insert missing pieces of the puzzle.
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Tessellate
Students deform a triangle, rectangle or hexagon to form a polygon that tiles the plane.
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Tessellation Town
Students create their own tessellations using some unusual shapes.
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Lessons (11)
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Exploring Geometric Solids and Their Properties
This geometry applet provides an environment in which students can explore geometric relationships and make and test conjectures.
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Geometry Building Blocks
Explanations of geometry terms and polygons basics.
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Identifying and Classifying Polygons
Lesson and worksheets about properties of 2D shapes.
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Is This A Square?
Interactive tutorial on the concept of a square.
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Online Geoboard: Properties of Polygons
This two-part example describes activities that use interactive geoboards to help students identify simple geometric shapes, describe their properties, and develop spatial sense.
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Online Tangram Maker
Students can choose a picture and use all seven pieces to fill in the outline then use tangram pieces to form given polygons.
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Our House
Students use geometric shapes and to create a house that expresses your family's unique personality and characteristics.
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Pattern Maker
An interactive applet for creating, comparing, and viewing multiple repetitions of pattern units.
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Tessellations Using MS Paint
Instructions on how to create tessellations using Microsoft Paint.
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Transformation Machine
The interactive figures in this four-part example allow a user to manipulate a shape and observe its behavior under a particular transformation or composition of transformations.
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Types of Polygons
Table showing number of sides and angles for each polygon.
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