Key to Geometry Curriculum Review

Key to Geometry Curriculum Review

Our Experience

Key to Geometry was a bit of a let down after having completed all the other books in the Key to…series. We found that the explanations and direction in this series were confusing and difficult to follow. I would have liked to have seen more explanation as to the purpose of the different types of problems. I was under the mistaken impression that this curriculum would also cover geometric proofs, which sadly it did not. I realize that all the skills presented are necessary to complete proofs, but I did not find there to be much continuity or logic as to how concepts were presented.

The Facts

The Key to Geometry includes multiple answer books with complete illustrated solutions for each problem.

Book 1  Lines and Segments

Book 1 is strong.  It begins with drawing lines and connecting points and then moves on to naming triangles and drawing shapes.  Book 1 introduces naming angles and congruent figures.

Book 2  Circles

Book 2 concentrates solely on circles.  Students learn to draw circles, intersecting circles, and exam angles within. Book 2 covers radius, arcs, and begins teaching the drawing of triangles by using circles.

Book 3  Constructions

Book 3 delves deeper into triangles and introduces the comparison of angles. Quite a bit of time is spent on angles.

Book 4  Perpendiculars

Book 4 teaches the angles of a triangle and how to bisect angles. In addition, book 3 introduces the construction of a perpendicular to a line. This book sets up the steps for proofs by allowing the student to fill in select pieces of the proof.  Unfortunately, it never directly explains the concept.

Book 5  Square and Rectangles

Book 5 covers every aspect of squares and rectangles. It shows the student how to construct them by using angles and perpendicular bisectors. This book also introduces the construction of a segment congruent to a fraction of a given segment.

Book 6  Angles

Book 6 begins with reproducing angles.  It then moves to reproducing and comparing the sides and angles of polygons and triangles. From there it moves to doubling and tripling angles and constructing a triangle with sides double those of a given triangle as well as with sides half those of a given triangle.

Book 7 Perpendiculars and Parallels, Chords and Tangents, Circles

Books 7 and 8 are three times longer than the others and cover a great deal more information. That said, the directions are also more vague. Book 7 begins with perpendiculars and parallels by comparing angles. Also covered are corresponding and alternate interior angles. The properties of parallelograms and other quadrilaterals are explored by using skills from previous books. The second half of the book covers chords, tangents and circles including inscribing other shapes within a circle.

Book 8  Triangles, Parallel Lines, Similar Polygons

As previously mentioned, book 8 is long and covers a great deal of information although once again the directions are vague and sometimes difficult to follow.  This books seeks to tie together all the skills and concepts learned in the previous seven books.  Although some new concepts are introduced, the majority of the book is meant to allow students to put their cumulative knowledge to use.


Also Available in the Key to Series

Key to Fractions

Key to Decimals

Key to Percents

Key to Measurement

Key to Metric Measurement

Key to Algebra

Where to Purchase

Coming Soon!






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