| Euclid, John Keill - Geometry - 1733 - 393 pages
...Planes thereof are equal Parallelograms. For becaufe the parallel Planes BG, CE, are cut • 16 of tlii. **by the Plane AC, their common Sections are * parallel...has been proved to be parallel to CD ; wherefore AC** {hall be a Parallelogram. After the fame Manner/ we demonftrate that CE, FG, GB, BF, or AE, is a Parallelogram.... | |
| Robert Simson - Trigonometry - 1762 - 466 pages
...parallel planes, BG, CE are cut by the plane -• ifi. ii. AC, their common fections AB, CD are parallel", **again, becaufe the two parallel planes BF, AE are cut by the plane AC, their common** fections AD, BC are parallel ". and AB is parallel to CD ; therefore AC is a parallelogram, in like... | |
| John Keill - Geometry - 1772 - 399 pages
...Plane AC, their common Sections are * paral- » i€ •f&i. lei ; wherefore AB is parallel to C D. **Again, becaufe the two parallel Planes BF, AE, are...fhall be a Parallelogram. After the fame manner we** demonftrate, that CE, FG, GB, BF, and AE, are Parallelograms. Let AH, DF, be joined : Then, becaufe... | |
| Robert Simson - Trigonometry - 1775 - 520 pages
...the two parallel planes, BG, CE are cut by the plane AC, their common fections AB, CD are parallel*. **Again, becaufe the two parallel planes BF, AE are cut by the plane AC, their common** fections AD, BC are parallel" : And AB is parallel to CD ; therefore AC is a parallelogram. In like... | |
| Euclid - 1781 - 520 pages
...parallel planes, BG, CE, are cut by the a 16. H. planc AC, their common fections AB, CD, are parallel '. **Again, becaufe the two parallel planes BF, AE, are cut by the plane AC, their common** fe&ions AD, BC, are parallel* : And AB is parallel to CD ; therefore AC is a parallelogram. In like... | |
| Alexander Ingram - Trigonometry - 1799 - 351 pages
...are cut by the plane AC, a it. n. their common feftions AB, CD are parallels *. Again, becaufe the **parallel planes BF, AE are cut by the plane AC, their common** feftions AD, BC are parallel a ; therefore AC is a parallelogram. In the fame manner, it may be proved,... | |
| Robert Simson - Trigonometry - 1804
...parallel planes, BG, CE are cut by the plane e. 16. tt. AC, their common fections AB, CD are parallel «. **again, becaufe the two parallel planes BF, AE are cut by the plane AC, their common** feftions AD, BC are parallel a. and AB is parallel to CD; therefore AC is. a parallelogram. in like... | |
| John Playfair - Euclid's Elements - 1804 - 440 pages
...BG, CE, are cut by the plane AC, their common feftions AB, CD are parallel ". A- 8i4. i.Sup. gain, **becaufe the two parallel planes BF, AE, are cut by the plane AC, their common** feftions AD, BC are parallel a : and AB is parallel to CD ; therefore AC is a parallelogram. In like... | |
| Euclid, Robert Simson - Euclid's Elements - 1806 - 518 pages
...CE are cut by the plane a 16. 11. AC, their common sections AB, CD are parallel ». Again, because **the two parallel planes BF, AE are cut by the plane AC, their common sections** AD, BC are parallel » : and AB is parallel to CD ; therefore AC is a parallelogram. In like manner,... | |
| John Playfair - Euclid's Elements - 1806 - 311 pages
...BG, CE are cut by the al4.2.Sup. plane AC, their common sections AB, CD are parallel* ; and because **the two parallel planes BF, AE are cut by the plane AC, their common sections** AD, BC are parallel*. Hence AC is a parallelogram. In like manner it may be proved that each of the... | |
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