Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 33
Fig. 6. — Using the Triangle in Connection withthe T-square. … Fig. 7. — Exact Angles that can be drawn, using Triangles and T-Square. Fig. 7 shows the angles that can be accurately drawn by using the 60° and 45° triangles and T-square. DRAWING INSTRUMENTS AND MATERIALS 13 A triangle should not be used alone in drawing lines parallel orat a given angle with…
Mechanical drawing
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