All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sidef. Plane Trigonometry - Page 13by Sidney Luxton Loney - 1893 - 480 pagesFull view - About this book
| Edward Laurence - Surveying - 1716 - 408 pages
...external < a, is equal to t wo right Angles (by tbe^tb /)confequently all the internal and external Angles are equal to twice as many right Angles as the Figure has fides. But all its internal Angles are equal to twiee as many right Angles eicept 4 as it has fides... | |
| Robert Simson - Trigonometry - 1762 - 488 pages
...angles. wherefore if a fide of a triangle &c. Q^ED CoR. i . All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has fides. For any recHlineal figure ABCDE can be divided into as many triangles as the figure has fides... | |
| Euclid - Geometry - 1765 - 492 pages
...(for every whole ig equal to all its parts taken together) therefore .all the angles of a right-lined figure, together with four right angles, are equal to twice as many right angles as the figure has fides. And taking away four right angles from each, there will remain all the angles of the figure... | |
| Robert Simson - Trigonometry - 1775 - 534 pages
...vertex of the triangles; that is", together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has fides. CoR. 2. All the exterior angles of any re&ilineal figure, are together equal to four right angles.... | |
| Euclid - 1781 - 552 pages
...vertex of the triangles; that isa, together with four right angles. Thprefpre all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has fides. CoR. 2. All the exterior angles of any rectilineal figure, arc together equal to four right... | |
| John McGregor (teacher of mathematics.) - Mathematics - 1792 - 532 pages
...angles of any regular polygon* 3By cor. i ft, I. 32. Euclid. All the anterior angles of any reoilineal figure, together with four right angles, are equal to twice as many right angles as the figure has fides. Hence the following rule. RULÉ. From double thé number of fides f übt vail: 4, and the remainder... | |
| Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...vertex of the triangles : that is a, together witi four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many rigit angles as the fi rurehas fides. CoR. 2. All the exterior angles of any reftilineal figure an... | |
| Alexander Ingram - Trigonometry - 1799 - 374 pages
...vertex of the triangles ; that is *, together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has fides. COR. 2. All the exterior angles of any reftilineal figure, are together equal to four right... | |
| Robert Simson - Trigonometry - 1804 - 530 pages
...angles. wherefore if a fide of a triangle, &c. Q^ED . CoR. i. All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has fides. For any reCtilineal figure ABCDE can be divided into as many triangles as the figure has fides,... | |
| Euclid, Robert Simson - Geometry - 1821 - 514 pages
...angles. Wherefore if a side of a triangle, &c. QED COK. 1. All the interior aigles of any rectilineal figure, together with four right angles, are equal to twice as many right E' angles as the figure has sides. For any rectilineal figure ABCDE can be divided into as many triangles... | |
| |