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© 1998, 1999, WetCanvas! |
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Lay your ruler across the 4-inch dot and the left vanishing point. Draw a light line approximately as long as the barn. |
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Use an architect's trick laying the ruler on the left angle of the roof and slide... |
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Slide to the left side of the barn while keeping the same angle. Draw a line from the left side of the barn to the top line and erase the extra part of the top line if any. |
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Lay the zero end of the ruler on the first angular line again. Put a small mark on the line at ¾ of an inch. |