Tuesday, 9 February 2016

Two Dimensions

We were talking about dimensions in 4G today. Why is a flat shape called a two dimensional (2D) shape?

One way of answering that is to say that you could draw the shape with just two directions. With a toy called an Etch-A-Sketch you could draw anything 2D just by turning the two knobs. (In this Scratch version, you use the arrow keys on a keyboard, which means it's a bit more jerky. Click the space bar to clear the picture.)

Here's the Etch-A-Sketch in Toy Story. (Normally they don't draw on their own!)

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