> ## Measuring an Arc

> Use the Arc option to define or select an arc in the drawing and measure its radius, center and diameter.

> 1. From the Analysis menu, select Measure.

> The Measurement dialog box appears.

> Note: From the AutoVue toolbar, you can also click Measure .

> 2. Click the Arc tab.
> 3. Select From 3 Points if you want to measure the arc between three points. Snapping modes are displayed.

> Select the snapping modes that you want to use for measuring.

> To select all snapping modes click All On.

> To deselect all snapping modes click All Off.

> See EDA Snapping Modes

> 4. Select Arc Entity if you want to measure a predefined arc.
> 5. From the Arc Info list, select the unit in which you want to measure the distance of the arc.
> 6. From the Measured Angle Units list, select the unit in which you want to measure the angle.
> 7. If you selected From 3 Points, click three points to define the arc.

> The points are joined by an arc. The measurements for center point coordinates, radius, diameter, arc length, start and end of angle and sweep appear in the Measurement dialog box.

> 8. If you selected Arc Entity, click the edge of the arc that you want to measure.

> The arc is highlighted. The measurements for center point coordinates, radius, diameter, arc length, start and end of angle and sweep appear in the Measurement dialog box.

> Note: Click Reset to take another measurement.

> 9. Click Close to close the Measurement dialog box.

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