Representations of Three- Dimensional Figures Page 212 in Know-It Notebook Draw representations of three-dimensional figures. Recognize a three- dimensional figure from a given representation.
Dec 22, 2015
Representations of Three-Dimensional FiguresRepresentations of Three-Dimensional Figures
Page 212 in Know-It Notebook
Draw representations of three-dimensional figures.
Recognize a three-dimensional figure from a given representation.
FHS Chapter 10 2
Warm UpWarm Up
Write a description of each figure. Describe the base(s) and other faces or surfaces.
1. cube
2. pentagonal prism
3. cylinder
All faces are squares.
The 2 bases are pentagons and the other 5 faces are parallelograms
The two bases are circles. The other surface is curved and joins the two circles together.
FHS Chapter 10 3
• An orthographic drawing shows six different views of an object: top, bottom, front, back, left side, and right side.
• Here’s an example:
Orthographic DrawingOrthographic Drawing
Left side
Right side
Front Back
Bottom
Top
FHS Chapter 10 4
Orthographic DrawingOrthographic Drawing• See if you can draw each view of the
following figure:
front
top
bottom
back
right
left
FHS Chapter 10 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Isometric DrawingIsometric Drawing
• Isometric drawing is a way to show three sides of a figure from a corner view, usually using isometric dot paper.
• Here is an example
FHS Chapter 10 6
Perspective DrawingPerspective Drawing• In a perspective drawing, lines are drawn
so that they meet at a point called a vanishing point.
• Vanishing points are located on a line called horizon.
• Here is an example of one-point perspective:
HorizonVanishing
Point
FHS Chapter 10 7
Perspective DrawingPerspective Drawing
• Here is an example of two-point perspective:
Horizon
Vanishing Points
FHS Chapter 10 8
Helpful HintHelpful Hint• In a one-point perspective drawing
of a cube, you are looking at a face. In a two-point perspective drawing, you are looking at a corner.
One-point perspective
Two-point perspective
FHS Chapter 10 9
How To Draw With One-point Perspective:How To Draw With One-point Perspective:1. Draw a horizon and a
vanishing point.
2. Draw light pencil lines from each vertex to the vanishing point.
3. Draw lines parallel to lines in figure.
4. Connect corners.
5. Erase pencil lines.
FHS Chapter 10 10
Lesson Quiz – Part ILesson Quiz – Part I1. Draw all six orthographic
views of the object. Assume there are no hidden cubes.
FHS Chapter 10 11
Lesson Quiz – Part IILesson Quiz – Part II
2. Draw an isometric view of the object.
FHS Chapter 10 12
AssignmentAssignment
pp. 665-666: #2, 4, 10-13, 14, 16, 22-25
Page 665
Page 666