What do you call a number value or equation that controls the size or location of a geometric figure?

The correct answer is a numeric constraint. Numeric constraints are values or equations that dictate specific measurements and positions within a geometric figure. They define precise parameters, such as length, width, or radius, and ensure that the dimensions of the design conform to the specified requirements. This control is crucial in engineering design, as it allows for the rigorous application of mathematical principles to create accurate and functional geometric shapes.

In contrast, geometric constraints typically deal with the relationships between different geometric elements, such as ensuring two lines remain parallel or two circles are concentric. Algebraic expressions might define relationships or calculations but do not necessarily provide direct control over size or location. Dimensional limits refer to the maximum or minimum sizes permissible but are not actively controlling values or equations as numeric constraints do. Thus, numeric constraint serves as the most appropriate term for defining measurement and position control in geometric design.