The Quadrilateral is a math book that covers all aspects of elementary geometry, especially the study of the quadrilateral. Written in a clear and concise style, this book is perfect for students who are studying geometry for the first time. It includes definitions, theorems, and examples, and each section ends with a set of exercises to test what you've learned. Whether you're a student struggling with geometry or a teacher looking for a reliable textbook, The Quadrilateral is an indispensable reference book on the subject.

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