Question

introduction to print reading: identify the line indicated by a * 1 point object line center line hidden line dimension line extension line

Explanation:

In print reading, an extension line is used to indicate the extent of a dimension. It extends from the feature being dimensioned and is typically perpendicular to the dimension line. The line indicated by A in the diagram fits the description of an extension line as it extends from the edge of the object to show where the dimension (in this case, dimension 2) is being measured from.

Answer:

Extension Line