 | Euclides - Geometry - 1841 - 378 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section, DE is perpendicular* to the third plane. In the same manner it may Jp be proved that DF is perpendicular... | |
 | Euclides - 1845 - 546 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third pkne, and DE is drawn in the plane AB at right angles to AD, their common section, DE is perpendicular to the third plane. (xi. def. 4.) In the same manner, it may be proved, that DF... | |
 | Euclid - Geometry - 1845 - 218 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section, DE is perpendicular to the third plane*: In the same manner it may be proved, that DF is perpendicular... | |
 | Euclides - 1846 - 292 pages
...BC with the third plane : Then, because thf plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section, DE is perpendicular to the third plane (11. Def. 4) : And, in like manner, it may be proved that DF... | |
 | Euclides - 1855 - 230 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section, DE is perpendicular to the third plane (b): in the same manner it may be proved, that DF is perpendicular... | |
 | Euclides - 1855 - 270 pages
...plane B ะก with the third plane. Because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD, their common section, DE is perpendicular (XI. Def. 4) to the third plane. In the same manner, it may be proved, that DP... | |
 | Eucleides - 1860 - 396 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section, DE is /-a\ I II perpendicular to the third plane (4) : m XI. Def. 4. in the same manner it may be proved,... | |
 | Euclides - 1864 - 448 pages
...plane 5(7 with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD, their common section, DE is perpendicular to the third plane. (XI. def. 4.) In the same manner, it may be proved, that DF... | |
 | Euclides - 1865 - 402 pages
...DEMONSTKATION Because the plane AB is perpendicular to the third plane, (hyp.) and DE is assumed to be drawn in the plane AB at right angles to AD, their common section, therefore DE must be perpendicular to the third plane. (XL def. 4.) In the same manner, it may be proved, that DF... | |
 | Robert Potts - 1865 - 528 pages
...plane BC with the third plane. And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD, their common section, DE is perpendicular to the third plane, (xi. def. 4.) In the same manner, it may be proved, that DF... | |
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And because the plane AB is perpendicular to the third plane, and DE is drawn in the plane AB at right angles to AD their common section... 
