173 Copyright Goodheart-Willcox Co., Inc. Technical Terms aligned dimensioning baseline dimensioning bolt circle chain dimensioning contour dimensioning coordinate dimensioning without dimension lines dimensioning dimensioning mechanics drawing graphic sheet dual dimensioning location dimension reference dimension size dimension tabular dimension true geometry view undimensioned drawing unidirectional dimensioning Learning Objectives After completing this unit, you will be able to: ❑ Identify terms and measurements associated with dimensioning mechanics. ❑ Identify symbols that have been standardized for dimensioning notations. ❑ Explain the choice and placement rules drafters use when creating dimensions. ❑ Identify and discuss various systems and methods for dimensioning. ❑ Describe additional types of dimensions used in special ways. ❑ Discuss alternative methods for describing size and applying dimensions. Dimensioning Unit 9