Key to Geometry, Book 3: Constructions

by McGraw-Hill Education (Contributor), George Gearhart, Patrick C. Suppes

Key to Geometry introduces students to a wide range of geometric discoveries as they do step-by-step constructions. Using only a pencil, compass, and straightedge, students begin by drawing lines, bisecting angles, and reproducing segments. Later they do sophisticated constructions involving over a dozen steps. When they finish, students will have been introduced to 134 geometric terms and will be ready to tackle formal proofs. Book 3 of Key to Geometry

64 pages, Paperback

First published January 1, 1

About the author

McGraw-Hill Education traces its history back to 1888 when James H. McGraw, co-founder of the company, purchased the American Journal of Railway Appliances. He continued to add further publications, eventually establishing The McGraw Publishing Company in 1899. His co-founder, John A. Hill, had also produced several technical and trade publications and in 1902 formed his own business, The Hill Publishing Company.

In 1909 both men agreed upon an alliance and combined the book departments of their publishing companies into The McGraw-Hill Book Company. John Hill served as President, with James McGraw as Vice-President. 1917 saw the merger of the remaining parts of each business into The McGraw-Hill Publishing Company, Inc.

Reviews

[Ardyth]

Book three in the "Key to" series of workbooks for practical geometry focuses on basic constructions of congruent line segments, triangles and angles as well as bisecting line segments and angles.

As with other books in the series, exercises use only a straightedge and compass -- no measurement against markings on a ruler or protractor.

Contents of Book 3:
... review of constructing congruent line segments and equilateral triangles (covered in depth in previous books)
... constructing triangles congruent to given triangles (this is the first exercise in the series to move beyond equilateral triangles)
... doubling and tripling length of a line segment
... bisecting line segments
... determining whether angles and triangles are congruent
... bisecting angles

For the Key to Geometry series as a whole, see my review of book one here:

https://www.goodreads.com/review/show...