| Interior Crown Molding Miters & Bevels for Octagon |
| This image is for a plan angle of 135° with the crown going from horizontal to a vertical slope. |
| Crown Slope Angle = 10.37993° |
| Corner Angle = 129.76216° |
| Crown Miter Angle = 24.75746° |
| Crown Bevel Angle = 4.38648° |
| This image is for a plan angle of 135° with the rake crown turning the vertical plane corner. |
| Crown Slope Angle = 10.37993° |
| Corner Angle = 140.23784° |
| Crown Miter Angle = 19.58065° |
| Crown Bevel Angle = 3.51282° |

Front view of both Octagon crown molding corners turning in the vertical plane.

You can see from this image that the backside of the crown molding needs to be beveled to rest flat against the ceiling.

You can see from this image that the backside of the crown molding needs to be beveled to rest flat against the ceiling.

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