Descriptive Geometry · Module 8

Axonometry

A spatial image in one view

Isometric and oblique projection for intuitive 3D images.

3 lessons
~29 min
3 interactive constructions

Start with the first lesson In the knowledge map

Lessons

Every lesson stands on an interactive construction – turn it, move the points, then build it yourself.

1
Lesson 1High school~9 minContinue here
Axes and foreshortening
Why one image is enough – three axes, three ratios and Pohlke’s theorem.
2
Lesson 2High school~9 min
Isometry, dimetry, trimetry
Equal foreshortening on all three axes – and what happens when they are not equal.
3
Lesson 3High school~11 min
The axonometric triangle
The image plane’s traces on the axes – and the origin as the orthocentre.