 | Euclid, John Keill - Geometry - 1733 - 444 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 - 488 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 - 462 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 - 534 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 - 552 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 - 374 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 - 530 pages
...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 - Circle-squaring - 1804 - 468 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... | |
 | Robert Simson - Trigonometry - 1806 - 546 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 - Mathematics - 1806 - 320 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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CD; therefore AC is a parallelogram. In like manner, it may be proved that each of the figures CE, FG, GB, BF, AE, is a parallelogram... 
