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© 1998, 1999, WetCanvas! |
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Lay the ruler on the vertical line and the left vanishing point and draw a line until it is approximately as long as the 3-inch angular line. |
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Draw a vertical line from the bottom angular line to the top angular line and erase any extra length off the top line. |
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Lay the zero end of the ruler on the first
angular line as if you were drawing the angular line again. Put a small mark on the line at 1 and 1/8 inches. |
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Put the zero end of the ruler on the mark you just made and make the ruler as vertical as you can. Then put a mark at 4-inches. |