GEOMETRY LABS ACTIVITIES FOR GRADES 8–11

GEOMETRY Henri Picciotto

LABS

ACTIVITIES FOR GRADES 8?11

120?

120?

B + C = 50?

30? 150?

150? 30?

120? 120?

120? 120?

Pmax = 2A + 2

120?

60?

60?

120?

(a + b) 2 - 2ab

120? 60?

120?

60?

(a + b) 2 - 2ab

90?

90?

60?

60?

60?

90?

90?

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Geometry Labs

Henri Picciotto

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Reproduction Permission

? 1999 by Henri Picciotto. Some rights reserved.Henri Picciotto grants the teacher who downloads Geometry Labs the right to reproduce material for any non-commercial use.

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TMCircleTrig Geoboard is a trademark of Key Curriculum Press. All other registered trademarks and trademarks in this book are the property of their respective holders.

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Acknowledgments

Many of these activities were developed at the Urban School of San Francisco. Special thanks to my students and colleagues there, particularly Richard Lautze and Kim Seashore. Thanks also to Joe Todaro. As the editor of an earlier version of this book, he contributed many ideas. These math teachers and professors helped develop my love for geometry, or offered insights which have no doubt found their way into this book: Cal Crabill, G. D. Chakerian, Lew Douglas, Phil Mallinson, Sherman Stein, and Joel Teller. Finally, I'd like to thank the authors of the Elementary Science Study at the Educational Development Center, whose math units Tangrams and Pattern Blocks awakened in me an interest in doing math with manipulatives when I was a beginning teacher, many years ago.

Henri Picciotto

Geometry Labs

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