Parametric modeling requires the specification of some parameters so they can be used to make predictions. For example: placing a constraint on the radius of a circle.

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Placing constraints on a design is way of ensuring that any modifications made to the design are done so with design intent in mind.

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A good example of parametric designing is: Constraining two curves to maintain a point of tangency to each other.

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The radius of a circle or an arc can be constrained using the "Radius constrain" command.

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The "Fix" constrain command constrains a point or curve to a fixed location and orientation relative to the World Coordinate System.

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Using a "Fix" constraint you lock the center of a circle. The circle remains locked and cannot be stretched.

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The "Radius" constraint is an example of a Geometric constraint

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The "Tangent' constraint is an example of a Dimensional constraint.

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In the attached mouse picture, where would a parametric constraint be best applied?

• On the arc with the 5.77" radius

• On the arc with the 4" radius

• The design does not need a constraint.

• On the arc with an unknown radius

What is the command that deletes constraints from selected objects?

• Removeconstraint

• Erase

• Delete button on the keyboard

• Delete Constraints