Positioning Pen for Constructions

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Illustration showing the correct and incorrect position of a right line pen against a T-square, triangle, or straight edge when doing geometric constructions.

Source

Kenison, Ervin Mechanical Drawing (Chicago, IL: American School of Correspondence, 1916)

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2400×391, 203.8 KiB

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1024×166, 21.6 KiB

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640×104, 11.2 KiB

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320×52, 4.5 KiB