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Secrets of Triangles: A Mathematical Journey

by Alfred S. Posamentier

A closer look at triangle geometry

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AlbakiReads Editorial

A closer look at triangle geometry

Triangles serve as the starting point for a tour of geometric relationships among their lines, points, and circles. One example described in the book connects an inscribed circle’s points of tangency with the triangle’s opposite vertices, revealing a shared intersection. Alongside such properties, the book presents methods for constructing triangles with a straightedge and compass, linking geometric ideas to practical problem-solving. Its scope stays with triangle-focused geometry, and the description indicates that high-school mathematics is sufficient background. The emphasis is on exploring how much mathematical structure can be found in a familiar three-sided figure.

Good fit for readers who enjoy

  • Readers with a high-school mathematics background interested in geometry.
  • Those curious about triangle properties and geometric constructions.
  • Learners looking for geometry problems that connect constructions with problem-solving.

Themes

Triangle geometryGeometric relationshipsStraightedge-and-compass constructionsMathematical problem-solving

Based on publisher information and book metadata.

Book overview

Everyone knows what a triangle is, yet very few people appreciate that the common three-sided figure holds many intriguing "secrets." For example, if a circle is inscribed in any random triangle and then three lines are drawn from the three points of tangency to the opposite vertices of the triangle, these lines will always meet at a common point - no matter what the shape of the triangle. This and many more interesting geometrical properties are revealed in this entertaining and illuminating book about geometry. Flying in the face of the common impression that mathematics is usually dry and intimidating, this book proves that this sometimes-daunting, abstract discipline can be both fun and intellectually stimulating. The authors, two veteran math educators, explore the multitude of surprising relationships connected with triangles and show some clever approaches to constructing triangles using a straightedge and a compass. Readers will learn how they can improve their problem-solving skills by performing these triangle constructions. The lines, points, and circles related to triangles harbor countless surprising relationships that are presented here in a very engaging fashion.Requiring no more than a knowledge of high school mathematics and written in clear and accessible language, this book will give all readers a new insight into some of the most enjoyable and fascinating aspects of geometry.
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