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. Pure Mathematics - Page 1051874Full view - About this book
| Robert Simson - Trigonometry - 1762 - 466 pages
...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... | |
| Joseph Fenn - Mathematics - 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... | |
| Robert Simson - Trigonometry - 1775 - 520 pages
...is equal c to the angle GDB: But when a ftraight line ftanding upon another ftraight line makes .A. **the adjacent angles equal to one another, each of the angles is** a right angle d : Therefore the angle GDB is a " d to. def. i« right angle : But FDB is likewife a... | |
| Euclid - 1781 - 520 pages
...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... | |
| Thomas Beddoes - Greek language - 1793 - 172 pages
...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... | |
| John Playfair - Euclid's Elements - 1795 - 400 pages
...angle ADG is equal c. ,to the angle GDB : But when a ftraight line flanding upon another ftraight line **makes the adjacent angles equal to one another, each of the angles is** a right angle d. d7def.i. Therefore the angle GDB is a right angle : But FDB is .likewife a right angle... | |
| Alexander Ingram - Trigonometry - 1799 - 351 pages
...Therefore the angle ADG is equal GDB : But when a ftraight line flanding upon another ftraight line **makes the adjacent angles equal to one another, each of the angles is** a right angle d : Therefore the angle GDB is a right angle : But FDB is likewife a right angle ; wherefore... | |
| Robert Simson - Trigonometry - 1804
...ADG is equal c to the angle GDB. but when a ftraight A line (landing upon another ftraight line, -**. **makes the adjacent angles equal to one another, each of the angles is** a right angle d. therefore the angle GDB is a right angle. but FDB is ' likewife a right angle ; wherefore... | |
| Euclid, Robert Simson - Euclid's Elements - 1806 - 518 pages
...placed at that point; as < the angle at E.' X. When a straight line standing on another straight lii>e **makes the adjacent angles equal to one another, each...stands on the other is called a perpendicular to it.** XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which... | |
| John Playfair - Euclid's Elements - 1806 - 311 pages
...placed at that point ; as the angle at E.' VII. When a straight line standing on another straight line **makes the adjacent angles equal to .one another, each...stands on the other is called a perpendicular to it.** _____ VIII, Book I. An obtuse angle is that which is greater than a right angle. IX. An acute angle... | |
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