 | Woolwich roy. military acad, Walter Ferrier Austin - 1880 - 190 páginas
...same plane. 2. From the same point in a given plane there cannot bo two straight lines at right angles to the plane upon the same side of it ; and there can be but one perpendicular to a plane from a point above the plane. If a pyramid stand on a square base... | |
 | 1884 - 538 páginas
...have, and the polygons are to one another in the duplicate ratio of their homologous sides. . / 16. "From the same point in a given plane, there cannot be two straight lines at right angles to the plane, on the same side of it, and there can be but one perpendicular to a plane... | |
 | 1870 - 964 páginas
...When is a straight line at right angles to a plane, and when Ls one plane perpendicular to another ? From the same point in a given plane there cannot be two straight lines at right angles to the plane upon the same side of it. 5. If ABCD be a quadrilateral figure inscribed... | |
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From the same point in a given plane there cannot be two straight lines at right angles to the plane, upon the same side of it : and there can be but one perpendicular to a plane from a point above the plane. 
