Measure an arc diameter
- Open the Radial menu on the 3D Document toolbar. (Click the drop-down arrow to the right of the Radial icon to see a drop-down menu listing the available commands.)
- Click Arc Diameter.
- Optional:
- Select Lock tool to use the command more than once. You can keep adding Arc Diameter markups to the scene until you click Stop.
- Enter a hyperlink to a file or to a document and user view within the current file.
- Position your pointer over the arc you want to measure in the model. The arc is highlighted when the pointer is properly positioned for selection.
- Click on the arc.
- Drag the label into position and click once.
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 Measure an arc radius
- Open the Radial menu on the 3D Document Toolbar. (Click the drop-down arrow to the right of the Radial icon to see a drop-down menu listing the available commands.)
- Click Arc Radius.
- Optional:
- Select Lock tool to use the command more than once. You can keep adding Arc Radius markups to the scene until you click Stop.
- Enter a hyperlink to a file or to a document and user view within the current file.
- Position your pointer over the arc you want to measure in the model. The arc is highlighted when the pointer is properly positioned for selection.
- Click on the arc.
- Drag the label into position and click once.
 Measure a circle by three points
- Open the Radial menu on the 3D Document toolbar. (Click the drop-down arrow to the right of the Radial icon to see a drop-down menu listing the available commands.)
- Click Circle by Three Vertices.
- Optional:
- Select Lock tool to use the command more than once. You can keep adding measurements to the scene until you click Stop.
- Enter a hyperlink to a file or to a document and user view within the current file.
- Click three vertices on the model. Crosshairs indicate when the pointer is properly positioned over a point.
- Drag the label into position and click once.