Engineering Drawing, 2nd Edition

7

Projections of Planes

OBJECTIVES

After studying this chapter, you will be able to

• Draw the projections of the plane surfaces of regular shapes like triangles, squares, rectangles, circles or semicircles in the following positions:
  • parallel to one of the reference planes
  • perpendicular to one and inclined to the other reference plane
  • inclined at angles other than 0° or 90° to both the reference planes
• Find the true shape of a plane surface
• Find the angles of inclinations between a given plane and the reference planes, if the front and top views are given
• Obtain the solutions to various problems using the change-of-position method or the change-of-ground-line method

7.1 INTRODUCTION

In engineering drawing, an object is represented in ...