### Same method as multiview orthographic projections, except projection plane not parallel to any of the coordinate planes. Parallel lines are equally foreshortened.

### Isometric: Angles between all three principal axes are equal (120o). The same scale ratio applies along each axis.

### Dimetric: Angles between two of the principal axes are equal. Two scale ratios are needed.

### Trimetric: Angles different between the three principal axes. Three scale ratios required.

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