We will now make what will appear to be a digression, and discuss the geometric concept of area, and volume and such like things.
17.1 Signed Areas and Volumes
17.2 Representing Parallel Sided Figures
17.3 Properties of Determinants
17.4 Evaluating Determinants
17.5 The Alice in Wonderland Method for Evaluating Determinants on a Spreadsheet
17.6 Solving Several Simultaneous Linear Equations in Several Variables
17.7 Implementing Cramer's Rule on a Spreadsheet