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Geometry Basics from the 3rd Dimension

Hexominoes from Math World

Wikipedia does Hexominoes

Properties of Hexominoes

Platonic Solids from Math World

Paper Models of Polyhedra

Hexominoes in a Rectangle (with triminoes)

Wikipedia does Hexominoes

Relating Hexominoes to Pentominoes

Polyhedra Gallery

Geo-Measurement (working with surface area & volume)

Dr. Math: 3-Dimensional and Higher Geometry

Math for Morons Like Us--surface area & volume

Math.com: Volume Formulas

Math.com: Surface Area Formulas

Regent's Prep: Volume of Solids

Regent's Prep: Comparison of Volume among Similar Solids

GoMath: Spheres

Triple A Math: select your geometry topic

Amby's Brain Teasers & Puzzlers

Geo-Measurement (focus on 2-dimensional)

Math for Morons Like Us--area

Regent's Prep: Area in Coordinate Geometry

Math Wizz: Basic Shapes Problems

Math Wizz: Geometry meets Algebra Problems

Pi: What Is It?

Regent's Prep: Perimeter & Circumference Problems

Regent's Prep: Area of Circle

Mrs. Glosser's Geometry: Perimeter & Area

GoMath: Triangle Practice

BrainPop: area of parallelograms

Ask Dr. Math: 2-Dimensional Geometry

Ask Dr. Math: Geometric Formulas

Seaton Sluice (U.K.) Middle School Math Topics

Math.com: Area Formulas

Math.com: Perimeter FormulasFact Monster: Tables and Formulas

What's For Lunch? Pizza Cost Comparisons

Mrs. Glosser's Math Goodies: Circumference & Area of Circles

GoMath: Circle Practice

Math.com: Circle Definitions & Related Formulas