When establishing an isometric axis, you need:
A. a vertical line, two 30° angular lines, and a horizontal line.
B. a ground level line, a horizontal line, and two 30° angular lines.
C. a vertical line, a horizontal lines, and a 30° angular line.
D. a measurement line, a vertical line, and two 30° angular lines.
E. none of the above
Answer: A
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