What is the term for the ratio of the drawing size to the actual size of an object?

The correct answer is the term "Scale." In the context of technical drawings or blueprints, scale refers to the ratio that represents the relationship between the size of the drawing and the actual size of the object being depicted. For example, a scale of 1:100 means that one unit on the drawing represents 100 units in reality. This is crucial in design and architectural drawings, as it ensures that the dimensions can be accurately interpreted and constructed in real life.

Understanding the scale is vital for anyone working with blueprints, as it allows for proper measurement and communication regarding how a project should be built or understood in relation to its true dimensions. Other terms listed, like blueprint and projection, refer to different concepts in the field of design and drafting, while dimensioning involves specifying the exact measurements of objects in a drawing rather than the ratio itself.