third angel projection view

You may have noticed that the Plan is above the Elevation and the End Elevation of the right hand side is on the right of the Elevation. These changes in the position of the views are the only difference between projection methods.
Because the difference between projection methods is so small this presents little or no difficulty for engineers to interpret drawings, provided we indicate on the drawing which system we are using. The symbols for First Angle and Third Angle projection are shown below. The symbols are derived from a cut cone which has been projected in First or Third Angle respectively

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