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Concept Attainment

+Examples

+Non-Examples

+Examples

+Non-examples

+Find Patterns in Examples

+Example/Non-Example

+Practice

Horizon line:

Vanishing point:

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Box: First the vertical and horizontal lines of the face of the box:

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Then the orthogonal lines, connecting the corners of the box to the vanishing point.

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Now, the horizontal line showing how wide you want your box to be:

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Connect the lines to make your 3-D box:

You can then erase the lines you had drawn to connect the corners to the vanishing point.