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 الكتب الكتب 1 - 10 من 141 فيWhen a straight line standing on another straight line makes the adjacent angles....
When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ... - الصفحة 10
بواسطة Alexander Ingram - 1799 - عدد الصفحات: 351
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## Euclid's Elements of Geometry: From the Latin Translation of Commandine. To ...

John Keill - 1723 - عدد الصفحات: 364
...the Angle AFE j. g ti fhall bef equal to the Angle BFE. But when a Right Line {landing upon a Right Line makes the adjacent Angles equal to one another, each of the equal Angles is ia Right Angle. Wherefore AFE, or BFE, is a Right Angle. And therefore the Right Line...
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## Euclid's Elements of Geometry,: From the Latin Translation of Commandine. To ...

Euclid, John Keill - 1733 - عدد الصفحات: 393
...Therefore the Angle * 8- i. AD G is * equal to the Angle GD B. But when a Right Line ftanding upon 'a Right Line, makes the adjacent Angles equal to one another, each of the 10. i. equal Angles will f be a Right Angle. Wherefore the Angle GDB is a Right Angle. But FDB is alfo...
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1762 - عدد الصفحات: 466
...center G *. therefore the angle ADG is equal c to the angle GDB. but when a ftraight line ftanding upon another ftraight line, makes the adjacent angles equal to one another ,each of the angles is a right angle *. therefore the angle GDB is a right angle. but FDB is like- d.io.Def.i. wife a right...
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## Euclid's Elements of Geometry: The First Six, the Eleventh and Twelfth Books

Euclid - 1765 - عدد الصفحات: 464
...angle EH c [by prop. 8.] ; and thefe are adjacent angles. But when a right line flanding upon a right line makes the adjacent angles equal to one another, each of the equal angles is a right angle, and the ftanding right line is called a perpendicular to that upon which...
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## Instructions Given in the Drawing School Established by the Dublin Society ...

Joseph Fenn - 1769
...When a ftraight line (AB) {landing on another ftright line (CD) makes the adjacent angles (ABD, ABC,) equal to one another, each of the angles is called a right angle ; and the rtraight line (AB) which ftands on the other (CD) is called я perpendicular. Fig. 7. XI. An Obtvfe...
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## The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - 1775 - عدد الصفحات: 520
...equal' to the angle CHG; and they are adjacent angles ; but when a ftraight line ftanding cet on a ftraight line makes the adjacent angles equal to one another, each of them is a right angle, and the ftraight line which flands upon the other is called a perpendicular...
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## The elements of Euclid: with dissertations intended to assist and ..., المجلد 1

James Williamson - 1781
...angle contained by ECF, and they are adjacent or confequent: but when a ftraight line ftanding upon a ftraight line makes the adjacent angles equal to one another; each of the equal angles is a right angle: therefore each of the angles contained by DCF, FCE is a right angle....
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## The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - عدد الصفحات: 520
...is equal e to the angle GDB : Buk when a ftraight line flanding upon another ftraight line makes A the adjacent angles equal to one another, each of the angles is a right an. J£ gled: Therefore the angle GDB is a * dio.def.r. Tight angle : But FDB is likewife a...
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1781 - عدد الصفحات: 466
...equal e to the angle CHG; and they are adjacentc. 8. i. angles. but when a ftraight line ftanding on a ftraight line makes the adjacent angles equal to one another, each of them is aright angle, and the ftraight linewhich ftands upon the other is called a perpendiculartoit....
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## Observations on the nature of demonstrative evidence: with an explanation of ...

Thomas Beddoes - 1793 - عدد الصفحات: 172
...whether they are plane or otherwife. DEFINITION X, When a Jlfaight line ftanding on another Jiraight line makes the adjacent angles equal to one another,...each of the angles is called a right angle, and the line which Jlands on the other is called a perpendicular to it. Here we have an appeal made to the...
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