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Sketching Centerlines

A centerline is a type of construction geometry that can be used to enforce symmetry and control sketch geometry.
• There are two types of construction
Centerlines:
– Centerline
– Tangent Centerline

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Figure 2 – Dimensioning a Circle without a Centerline
Sketching Centerlines

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Figure 1 – Symmetry Created using a Centerline

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Figure 3 – Dimensioning a Circle using a Centerline
A centerline is a type of construction geometry that can be used to define a line of symmetry with a sketch. They are also used to control sketch
geometry. In Figure 2, the circle is dimensioned to the vertical and horizontal references. In Figure 3, the circle is dimensioned radially by using a centerline. Centerlines must be fully constrained by using dimensions or constraints like any other sketched entity. They have infinite length and do not create feature geometry.
There are two types of construction Centerlines:
• Centerline – Select Centerline from the Centerline types drop-down menu or right-click and select Centerline to create a Centerline through
two points.
• Tangent Centerline – Select Centerline Tangent from the Centerline types drop-down menu to create a centerline that is tangent to two circles, two arcs, or a circle and arc. You can only select arcs or circles when creating a Tangent Centerline.

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