| Robert Potts - 1868 - 410 pages
...right angles to the plane CK. DGAH Let any plane DE pass through AB, and let CE be the common section **of the planes DE, CK; take any point F in CE, from...which draw FG in the plane DE at right angles to CE,** (I. 11.) And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every... | |
| Robert Potts - Geometry, Plane - 1876 - 403 pages
...DE pass through AB, and let CE be the common section of the planes DE, CA ; take any point F in CK **from which draw FG in the plane DE at right angles to CE.** (i. 11.) And because AB is perpendicular to the plane LJi, therefore it is also perpendicular to every... | |
| Isaac Todhunter - Euclid's Elements - 1880 - 400 pages
...CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; [XI. 3. **take any point F in CE, from which draw FG, in the plane DE, at right angles to CE.** [I. 11. Then, "because AB is at right angles to the plane [Hypothesis. therefore it makes right angles... | |
| Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 400 pages
...Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; [XI. 3. Y **take any point F in > CE, from which draw FG, in the plane DE, at right angles to CE.** [1. 11. JThen, because AB is at night angles to the plane [Hypothesis. therefore it makes right angles... | |
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