Books Books
For the same reason, CD is likewise at right angles to the plane HGK. Therefore AB, CD are each of them at right angles to the plane HGK.
An elementary course of mathematics - Page 13
by Samuel Hunter Christie - 1847

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1762 - 488 pages
...therefore AB is at right E / ^ angles b to the plane HGK. for the .s b. 8 .n. fame reafon, CD is likewife at right — — —~angles to the plane HGK. therefore...each of them at right angles to the plane HGK. but \f Wo ftraighl: lines be at right angles to the fame plane, they i\ill be parallel c to one another....

## The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - Trigonometry - 1775 - 534 pages
.../ b 8l "' feme reafon, CDislikewifeat rii*ht r+ ..*rn angles to the plane HGK. ThtTre- w ^ ** fore AB, CD are each of them at right angles to the plane HGK. But if two ftraight lines be at right angles to the fame plane, they fliall be parallel c to one another. Therefore...

## The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 552 pages
...AB ; therefore AB is at right anglesb to the plane HGK. For the * a &f " famereafon, CD is likewife at right angles to the plane HGK. Therefore AB, CD...them at right angles to the plane HGK. But if two ftraight lines be at right angles to the fame plane, they fhall be parallel c to one another. Therefore...

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1781 - 534 pages
...for the S^ b. 8. u. fame reafbn, CD is likewife at right ' angles to the plane HGK. therefore O 1\_ AB, CD are each of them at right angles to the plane HGK. but if two ftruight lines be at right angles to the fame plane, they faall be parallel c to one another. therefore...

## Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...therefore AB is at right angles b A IT „ to the plane HGK. For the fame reafon, CD . * . ib like wife at right angles to the plane HGK. Therefore AB, CD...each of them at right angles to the plane HGK. But if Book vil. E-F -I) uijauci JJVJAV. .iJLii. i* . -t» • '• , ••• . ^ tv.ollraight lines are...

## The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - Trigonometry - 1799 - 374 pages
...reafon, CD is "/ likewife at right angles to the plane _ £_ _ HGK. Therefore AB, CD are each £ K. D of them at right angles to the plane HGK. But if two ftraight lines be at right angles to the fame plane, they are parallel c; therefore f. 6. it. AB is...

## The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - Trigonometry - 1804 - 530 pages
...11. fame reafon, CD is likewife at right ~ .__ .r: angles to the plane HGK. therefore \+ Jx. • J.* AB, CD are each of them at right angles to the plane HGK. but if two ftraight lines be at right angles to the fame plane, they fhall be parallel c to one another. therefore...

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1806 - 546 pages
...same reason, CD is likewise ^r at right angles to the plane HGK. r~ Therefore AB, CD are each of CK n them at right angles to the plane HGK. But if two straight lines be at right angles to the same plane, they shall be parallel6 to one another. Therefore AB is c 6....