# Oblique Projection

*If you are not familiar with Oblique Projection, start by reading our article 3D Drawing.*

Draw it in Oblique Projection - you may find using squared paper helpful.

Now try drawing it again, this time with a different face as the front.

Which properties of the original structure are preserved in your drawings, which are not? You should think about:

- the relationship between the lengths of the edges of the cubes
- the angles between them
- parallel and perpendicular lines

What do you think the advantages of Oblique Projection are? What disadvantages are there with this method of representing 3D objects in 2D?

### Why do this problem?

Representing 3D objects in two dimensions on paper is a vital skill in the Design Technology curriculum, as well as an aspect of Shape and Space in the Maths curriculum. This problem is part of a set of problems which will help students to understand why there are different ways to represent a 3D object in two dimensions, and what maths lies
behind each method.

The article 3D Drawing was written to support these problems.

### Key questions

What are the advantages of this method of 3D drawing? What are the disadvantages?

What features of the object are retained in the drawing, which are not?

### Possible extension

Oblique Projection is probably the easiest for students to understand. Those who find it straight-forward should be encouraged to tackle the other problems in this set (linked from 3D Drawing) and to compare the various methods.