Dimension an angle defined by three points

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To dimension the angle formed by three points.

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Right click and choose the angular option.

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The program prompts you to select an arc circle line or vertex.

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You can right click and choose the vertex option or simply press enter.

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Since vertex is the default option,

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the program prompts you to specify the angle vertex.

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First on the status bar, expand the object snap tool,

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make sure the center and quadrant object snap modes are selected

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and then toggle on object snap,

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then snap to the center of the large inner arc.

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The program then prompts you to specify the first angle end point,

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select the center of the middle circle on the right

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the program then prompts you to specify the second angle. End point,

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select the right quadrant of the inner arc.

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Now you can see a preview of the angular dimension and

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the program prompts you to specify the angular dimension location.

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Again, extension lines are added automatically

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and the angle measured depends on where you position the dimension line.

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Click to place the dimension outside the object toward the lower right