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BAG is a right angle (Def. 30.), the two straight lines AC, AG upon the opposite sides of AB, make with it at the point A the adjacent angles equal to two right angles; therefore CA is in the same straight line (i.
Elements of Geometry with Notes - Page 196
by John Radford Young - 1833 - 216 pages

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

Robert Simson - Trigonometry - 1762 - 488 pages
...AH aie in the fame Araight line./ and becaufe the angle DBC is equal to the angle FBA, each of thtm being a right angle, add to each the angle ABC, and...the whole angle DBA is equal* to the whole FBC. /and becaufe the two fides AB, BD are ei Ax. equal to the two FB, BC, each to each, and the angle DBA equal...

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

Euclid - 1781 - 552 pages
...Itraight line* with AG; for the fame rcafon, AB and AH are in the fame ftraight line ; and becaufe the angle DBC is equal to the angle FBA, each of them...whole angle DBA is equal * to the whole FBC ; and becaufe the two fIdes AB, BD - ». Ax. are equal to the two FB, BC, each to each, and the angle DBA...

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

Robert Simson - Trigonometry - 1781 - 534 pages
...ftraight line a with AG. for the lame reafon, AB and AH are in the fame ftraight line. and becaufe the angle DBC is equal to the angle FBA, each of them...each the angle ABC, and the whole angle DBA is equal c to the whole FBC. and becaufe the two fides AB, BD aree equal to the two FB, BC, each to each, and...

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

Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...ftraight line & with AG ; for the fame reafon, AB and AH are in the fame ftraight line ; and becaufe the angle DBC is equal to the angle FBA, each of them being a right angle, add to each t 2. Ax. the angle ABC, and the whole angle DBA is equal e to til whole FBC ; and becaufe the two fides...

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

Alexander Ingram - Trigonometry - 1799 - 374 pages
...raight line d with AG ; for the fame reafon, AB and AH are in the fame ftraight line : and becaufe the angle DBC is equal to the angle FBA, each of them being a right angle, add to each the angle ARC, e s. Ax. and tne whole angle DBA is equal e to the whole FBC ; and becaufe the two fides AB, BD...

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

Robert Simson - Trigonometry - 1804 - 530 pages
...d with AG. for the fame reafon, AB and AH are in the fame ftraight line. and becaufe the angle DBG is equal to the angle FBA, each of them being a right...whole angle DBA is equal « to the whole FBC. and becaufe the two fides AB, BD are equal to the two FB, BC, each to each, and the angle DBA equal to...

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

John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...ftraight line d with AG ; for the fame reafon, AB and AH are in the fame ftraight line. Now becaufe the angle DBC is equal "to the angle FBA, each of them being a right angle, adding to each the angle ABC, the whole angle DBA will be equal e to the whole FBC ; and becaufe the...

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

Robert Simson - Trigonometry - 1806 - 546 pages
...adjacent angles equal F to two right angles ; therefore CA is in the same straight line d with AG ; for the same reason, AB and AH are in the same straight...whole angle DBA is equal « to the whole FBC ; and e 2. Ax. because the two sides AB, BD are equal to the two FB, BC, each to each, and the angle DBA...