There exactly are two correct angles for a 3D pie chart: 1. Totally dead-on, so it appears to be 2D (Good) 2. Parallel to the surface of the pie, so you can't

There exactly are two correct angles for a 3D pie chart: 1. Totally dead-on, so it appears to be 2D (Good) 2. Parallel to the surface of the pie, so you can't see the pie and wind up using a better chart type instead (Better)