 | Euclid, John Keill - Geometry - 1723 - 436 pages
...cut *i6ofthis. by the Plane AC, their common Sections are * parallel; wherefore AB is parallel to CD. Again, becaufe the two parallel Planes BF, AE, are...fhall be a Parallelogram. After the fame Manner, we dejnonftrate that CE, FG, GB, BF, or AE, is a Parallelogram. Let AH, DF, bejoined. Then becaufe AB... | |
 | 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... | |
 | 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... | |
 | John Keill - Geometry - 1782 - 472 pages
...their common Sections are * paral- *'6 "/'*"• lei ; wherefore AB is parallel to C D. Again, because the two parallel Planes BF, AE, are cut by the Plane...Sections are parallel; therefore AD is parallel to B C. But AB has been proved to be parallel toC D; wherefore AC (hall be a Parallelogram. After the... | |
 | 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 - 528 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 - 548 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... | |
| |
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... 
