1.       What is a geometric constraint?

A Geometric constraint is a Constant, non-numerical relationship between the parts of a geometric figure.

2.       What are the different types of geometric constraints that are applied to sketches, and what are their functions?

Perpendicular is a constraint that causes lines or axes of curves to meet at right angles.

Parallel causes two or more lines or ellipse axes to be equidistant from each other.

Tangent is used to cause two arcs or a line and an arc to intersect at a single point perpendicular to the arc’s radius.

Coincident fixes two points together, or fixes a point to a curve.

Concentric causes two or more arcs, circles, or ellipses to share the same center point.

Colinear causes two lines or ellipse axes to lie along the same line.

Horizontal causes lines, ellipse axes, or pairs of points to lie parallel to the X axis of the sketch coordinate system.

Vertical causes lines, ellipse axes, or pairs of points to lie parallel to the y axis of the sketch coordinate system.

Equal forces line segments to be the same length and arcs or circles to have the same radius.

Fix constrains points or curves to a specific point on the sketch coordinate system.

Symmetry causes selected lines or curves to become symmetrically constrained about a selected line.

3.      How is a geometric constraint different from a numeric constraint?

In a numeric constraint, a number value, or algebraic equation that is used to control the size or location of a geometric figure. In a geometric constraint, a non number value is used to control the relationship of the parts to the figure.

4.      What types of numeric constraints may be applied to sketches?
You can use the general dimension to dimension out your figure. Auto dimension is used to dimension it out automatically.