Orthographic Projection

• What is another name for Orthographic Drawing?

  Multiview drawing
• What is the purpose of showing more than one view in a drawing presentation?

  To show the necessary information in any drawing presentation
• What does Orthographic Projection allow you to do?

  Make a two-dimensional drawing of a three-dimensional object using 2 or more views
• What are the Greek words that form the term Orthographic?

  Orthos (straight) and graphos (to draw)
• What is the first-angle projection used for?

  It is used by many European countries
• How does the third-angle projection differ from the first-angle projection?

  Third-angle projection is the standard for the United States
• What are the most used views in orthographic drawing?

  • Front View
  • Top View
  • Right Side View
• Which view is typically designated as the most descriptive in orthographic drawing?

  The Front View
• How are lines formed on the planes in orthographic drawing?

  By projecting the edges of the object onto the planes
• How many views are formed by the planes of a box?

  Six views
• Why must each view be placed in its correct position?

  To ensure views and features are aligned
• What dimensions does the Front View show?

  Width and height
• What dimensions does the Top View show?

  Width and depth
• What dimensions does the Side View show?

  Height and depth
• How is the Front View described in relation to an L shape?


  It shows exactly what would be seen when standing in front of the L shape
• What is a Plane/Top View also referred to as?

  A bird's eye view
• How is the Side View described in relation to an L shape?

  It shows what would be seen when standing directly at the side of the L shape
• What are the three dimensions of all objects?

  • Height: Distance from top to bottom
  • Width: Distance from side to side
  • Depth/Length: Distance from front to back
• How can depth be projected between views?

  By using a 45° projection line
• What is the precedence of lines in orthographic drawing?

  • Visible line coincides with hidden or center line: Visible line is shown
  • Hidden line coincides with center line: Hidden line is shown