Selected Solutions to Chapter 2 Exercises
A formal manipulator in mathematics often experiences the discomforting feeling that his pencil surpasses him in intelligence.
—Howard Eves, In Mathematical Circles (1969)

Section 2.1 – Introduction
      Exercise 2.1 Hint using GeoGebra html5 construction or a JavaSketchpad construction.
      Exercise 2.2. Hint using GeoGebra html5 construction or a JavaSketchpad construction.

Section 2.1 – Models
      Exercise 2.10. Sample diagrams.

Section 2.2 – Incidence Axioms
      Exercise 2.12.

Section 2.3 – Distance and Ruler Axioms
      Exercise 2.20.
      Exercise 2.24.

Section 2.4 – Angles and Angle Measure
      Exercise 2.38 (b)

Section 2.5 – Supplement Postulate
      Exercise 2.43.

Section 2.6 – Parallel Lines without a Parallel Postulate
      Exercise 2.55.
      Exercise 2.57.

Section 2.7 – Euclidean Parallel Postulate
      Exercise 2.67 – Euclidean Proposition 2.8.