Preface
About the Authors
Contents
Sample Activity 1: Cabri Geometry
Tour
Sample Activity 9: Properties
of Parallelograms
Teacher Information
Preface
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This book is designed to be used by geometry students
of any level and to cover the basic topics in geometry. We developed this
book to enhance your geometry class without taking time away from the curriculum.
Each activity is designed so that a student can walk
into the computer lab and, with a brief introduction to the Cabri software,
work through a series of steps to discover geometric concepts.
We have called the first activity in our series a tour.
It is designed to allow students to experience the different tools of Cabri
and also to reinforce the basic vocabulary they have learned in class.
Every student should complete the tour before working on the consecutive
activities. Each activity helps students to discover a theorem, postulate,
or geometric concept, and allows students to experience the true meaning
of these ideas. We encourage you to make copies of the tour available to
all of your students so that they can refer to if they have any problems
completing the basic constructions.
These activities have not only enhanced our classes but
improved our classroom environment. Our students enjoyed using the labs
and looked forward to going to the computer throughout the year.
We hope you have a great school year and enjoy using
technology as much as we do.
We would like to thank Raymond Klein and Cathy Jahr for
their comments on our manuscript, and Jeanie Anirudhan and Nelah McComsey
of Texas Instruments for their assistance in the production of this book.
ó Wendy Wilgus
ó Lisa Pizzuto
About
the Authors [back to top]
------------------------------------------------------------------------
WENDY WILGUS is currently a high school mathematics teacher
at Chattahoochee High School in Alpharetta, Georgia. She has been teaching
for six years. Her degree is from the University of Wisconsin at Eau Claire.
LISA PIZZUTO is a mathematics teacher at Chattahoochee
High School in Alpharetta, Georgia. She has taught geometry for ten years
and has a B.S. in mathematics from the State University of New York College
at Buffalo.
Contents
[back to top]
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Activity 1: Cabri Geometry Tour
Activity 2: Properties of Parallel Lines
Cut by a Transversal
Activity 3: Exterior and Interior Angle Theorem
Activity 4: Isosceles Triangle
Activity 5: Bisectors
Activity 6: Circumcenter and Incenter
Activity 7: Centroid and Orthocenter
Activity 8: Midsegment of a Triangle
Activity 9: Properties of Parallelograms
Activity 10: Special Parallelograms
Activity 11: Midsegment of a Trapezoid
Activity 12: Transformation
Activity 13: Similar Figures
Activity 14: Sin, Cos, and Tan of Right Triangles
Activity 15: Triangle Proportionality
Activity 16: Radius, Diameter, and Circumference
of a Circle
Activity 17: Perimeter and Area of a Square
Activity 18: Relationship of Angles to the
Circle
Appendix A: Teacher Information
Appendix B: Quick Reference
Chartwell-Yorke, 114 High Street, Belmont, Bolton, Lancashire, BL7 8AL, England, tel (+44) (0)1204 811001, fax (+44) (0)1204 811008, email info@chartwellyorke.com, http://www.chartwellyorke.com