Lines used to indicate distance between two points on a sketch are called?

Dimension lines are specifically used in technical drawings and sketches to indicate the distance between two points. These lines are essential for conveying the actual measurement of features and distances clearly and accurately. They are often accompanied by numerical values that denote the size or distance they represent.

Dimension lines are typically drawn as thin lines with arrowheads at each end, pointing towards the points they are measuring. This visual representation allows anyone viewing the drawing to quickly assess the dimensions without needing additional information.

In contrast, object lines are used to represent the outline of an object, extension lines help to extend the dimension from the object to the dimension line, and center lines are used to represent symmetry or to locate the center of circles or arcs. Each of these types of lines serves a different purpose in technical drawing, but dimension lines specifically focus on conveying measurable distances.