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| raise let fall a perpendicular (fällen); let fall a perpendicular; raise a perpendicular | |||
| erect a perpendicular (at a point); erect a normal; draw a normal; construct a perpendicular | |||
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| |||
| raise let fall a perpendicular (fällen); let fall a perpendicular; raise a perpendicular | |||
| erect a perpendicular (at a point); erect a normal; draw a normal; construct a perpendicular | |||