TAGD-172: Descriptive Geometry: Planes, Solids, and Developments

Business, Entrepreneurship, and Professional Development
Trade & Apprentice Education
Skilled Trade & Apprenticeship
Academic Level
Course Subject
TAE - Graphic Design
Course Number
Course Title
Descriptive Geometry: Planes, Solids, and Developments
Credit Hours
Instructor Contact Hours Per Semester
32.00 (for 15-week classes)
Student Contact Hours Per Semester
32.00 (for 15-week classes)
Grading Method
TAGD-171 or TAE Apprentice Coordinator/Instructor Permission
Catalog Course Description

Presents basic descriptive geometry theory and practice. Discusses how to use orthographic principles to find true views of planes and solids and their intersections.

Goals, Topics, and Objectives

Core Course Topics
  1. Intersections of lines with planes and solids.
  2. Intersections of multiple lines with a plane.
  3. Intersections of planes.
  4. Determining the bearing, slope, and grade of lines in space.
  5. Finding the strike and dip of planes.
  6. Introduction of cutting planes.
  7. Edge view method.
  8. Line projection method.
  9. Cutting sphere method.
  10. Applications of the four methods.
  11. Introduction to developments.
  12. Radial line developments.
  13. Triangulation method of constructing developments.
Core Course Learning Objectives (Separated)
  • Explain the concept of the relationship between lines, planes, and solids.
  • Explain and identify the various types intersections of solids and planes.*
  • Solve descriptive geometry problems involving lines, planes, and solids using manual and computer-assisted methods.*
  • Solve descriptive geometry problems requiring developments.*
  • Solve actual shop problems using given techniques.
  • Solve problems related to special developments.
  • *Work successfully in 3-dimensions using 2-dimensional representations.
  • Assessment and Requirements

    Assessment of Academic Achievement

    All students will be required to complete a comprehensive final examination that assesses the learning of all course objectives  This exam must be weighted in a manner so that the exam score is worth a minimum of fifteen percent of the final course grade.  This exam is to be a common exam administered to all sections of TAGD 172.

    General Course Requirements and Recommendations

    The student will be required to bring the drafting equipment used in the previous two drafting courses (TAGD 110 and TAGD 120).  Modeling clay is also required.


    Texts, handouts, and/or workbooks will be determined by the TAE Department.


    Effective Term
    Fall 2014