This textbook provides a full and complete axiomatic development of
exactly that part of plane Euclidean geometry that forms the standard
content of high school geometry. It begins with a set of points, a
measure of distance between pairs of points and ten simple axioms. From
there the notions of length, area and angle measure, along with
congruence and similarity, are carefully defined and their properties
proven as theorems. It concludes with a proof of the consistency of the
axioms used and a full description of their models. It is provided in
guided inquiry (inquiry-based) format with the intention that students
will be active learners, proving the theorems and presenting their
proofs to their class with the instructor as a mentor and a guide.
The book is written for graduate and advanced undergraduate students
interested in teaching secondary school mathematics, for pure math
majors interested in learning about the foundations of geometry, for
faculty preparing future secondary school teachers and as a reference
for any professional mathematician. It is written with the hope of
anchoring K-12 geometry in solid modern mathematics, thereby fortifying
the teaching of secondary and tertiary geometry with a deep
understanding of the subject.