In this introduction to polygons, a triangle convinces a shapeshifter to make him a quadrilateral and later a pentagon, but discovers that where angles and side

CD-ROM contains: Blackline masters for some of the activities illustrated in text -- Applets for students to manipulate -- Resources for professional developmen

IXL | The Ultimate Grade 2 Math Workbook | Multi-Digit Addition, Subtraction, Place Value, Measurement, Data, Geometry, Perimeter, Counting Money, and Time for

Geometry & Measurement Workbooks introduce important foundational math concepts gradually, which allows children to feel confident and eager to learn more. Our

Geometry & Measurement Workbooks introduce important foundational math concepts gradually, which allows children to feel confident and eager to learn more. Our