Page 39 - DESIGN & MODELING

Lesson 2: Isometric Sketching

Students will learn about isometric drawings and how they are used by engineers. Students will
learn to create simple isometric sketches using dot paper.

Isometric drawing, also called isometric projection, method of graphic representation of three-
dimensional objects, used by engineers, technical illustrators, and, occasionally, architects.
Isometric drawing is way of presenting designs/drawings in three dimensions. In order for a
design to appear three dimensional, a 30-degree angle is applied to its sides.

Isometric drawing detail…

Spatial visualization ability or visual-spatial ability is the ability to mentally manipulate 2-
dimensional and 3-dimensional figures. It is typically measured with simple cognitive tests and is
predictive of user performance with some kinds of user interfaces.

One of the most difficult spatial tasks is to mentally rotate an object. An example is to imagine
what an object looks like from the back and underneath, or in cross-section. This ability
improves as students get older. Practical experience with real three-dimensional objects, in
mathematics and other school subjects, is helpful, as is careful observation of the world around
us e.g. for drawing.

Interesting fact is there is evidence to suggest that, on average, girls are not quite as able as boys
in three-dimensional visualization. This may be due to different early experiences and interests,
or it may be due to slightly different innate abilities. This does not mean that all boys will have
good spatial skills, nor that all girls have poor spatial skills. It is important to include practical
visualization activities for all students.

Why is spatial ability important?

Visual-spatial skills are of great importance for success in solving many tasks in everyday life.
For instance, using a map to guide you through an unfamiliar city, merging into high-speed
traffic, and orienting yourself in your environment (as when you are learning your way around a
new school building) are all activities that involve spatial ability. Other examples of tasks
requiring visual-spatial ability include packing (as when you must decide if a

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