MECH 290 Lecture 8: lectures 8-10 - planar projections and pictorial views (1)

• School: McGill University
• Department: Mechanical Engineering
• Course: MECH 290
• Professor: Fiona Zhao

Document Summary

Solids are bounded by the surfaces that contain them. These surfaces can be one of the following four types: (cid:149) planar (cid:149) single curved (cid:149) double curved (cid:149) warped. Regardless of how complex a solid may be, it is composed of combinations of these basic types of surfaces. If the faces of a solid are equal regular polygons, it is called a regular polyhedron. A prism has two bases, which are parallel equal polygons, and three or more additional faces, which are parallelograms. A pyramid has a polygon for a base and triangular lateral faces that intersect at a common point called the vertex. A cylinder has a single- curved exterior surface. A cone has a single- curved exterior surface. An oblate or prolate ellipsoid is shaped like an egg. An edge of the solid is formed where two surfaces intersect. Edges are represented in drawings by visible or hidden lines.