Specifying Precise Arc Values
The VCB displays the chord length of the of the arc (after setting the starting point), then the bulge distance (after setting the ending point). Use the VCB to enter exact lengths for the chord length, bulge distance, radius value, and number of segments.
Note - SketchUp will use the current file units setting if you only type in a numerical value. You can also specify either Imperial (1'6") or Metric (3.652m) units at any time, regardless the file's units setting. Units are set within the Units panel of the Model Info dialog box.
Entering a Chord Length
The VCB's label indicates "Length" after you place the starting point of an arc. Type the chord length into the VCB, after placing the starting point of the arc, and press the Enter or Return key. Specify a negative value, such as -6.5", to indicate that you want the length to apply in an opposite direction to the current drawing direction.
Specifying a Bulge Distance
The VCB's label indicates "Bulge" after you place the ending point of an arc. Type the bulge length in the VCB, after placing an ending point, and press the Enter or Return Key. You can also enter the bulge distance after the creation of the arc as long as "Bulge" is displayed as the VCB label. Negative bulge values can also be used to create an arc in an opposite direction to the current drawing direction.
Specifying a Radius
You can specify an arc radius instead of a bulge distance. Type the desired radius in the VCB, followed by the letter 'r' and press the Enter or Return Key. You can perform this action either during or immediately following the creation of the arc. For example: 24r or 3'6"r or 5mr.
Specifying the Number of Segments
You can also specify the number of segments in an arc. Type the number of segments in the VCB, followed by the letter 's', and press the Enter or Return key. You can perform this action either during or immediately following the creation of the arc. For example: 20s.
Tangent at vertes
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