Geometry for Elementary School

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Book Chapters

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A PDF version is available. (info)

This book is intended for beginner readers.

• Introduction
• Our tools: Ruler and compass
• Points
• Lines
• Constructing equilateral triangle
• Copying a line segment
• Copying a triangle
• Copying an angle
• Constructing a triangle
• Why the constructions are not correct?
• The Side-Side-Side congruence theorem
• Bisecting an angle
• The Side-Angle-Side congruence theorem
• The Angle-Side-Angle congruence theorem
• Bisecting a segment
• Some impossible constructions
• Pythagorean theorem
• Parallel lines
• Squares
• A proof of irrationality
• Fractals
• What next?
• Notation

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Further Reading

Wikisource has original text related to: The Elements of Euclid

• Geometry