 | 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... | |
 | Edward Wells - Arithmetic - 1723 - 358 pages
...the Sum of all the Angles in all the Tri~ angles, into which the Figure is divided, will together be equal to twice as ma-ny right Angles, as the Figure has Sides. But the Angles about P, the inward Point of each Figure, wherein all the Triangles concur, are (by... | |
 | Robert Simson - Trigonometry - 1762 - 488 pages
...angles CBA, BAC, ACB are equal to two right angles. wherefore if a fide of a triangle &c. Q^ED CoR. i . All the interior angles of any rectilineal figure,...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... | |
 | Thomas Malton - 1774 - 484 pages
...by the Sides. ie equal to four Right Angles. And, all the internal Angles of any Right-lined Figure are equal to twice as many Right Angles as the Figure has Sides, wanting four, (Th. i. i0. i.) confequently, the external Angles being equal to thofe four (Th. 2. of... | |
 | 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 - 558 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... | |
 | 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
...angles CBA, BAC, ACB are equal to two right angles. Wherefore, if a fide of a triangle, &c. Q^ED CoR. i. All the interior angles of any rectilineal figure,...equal to twice as many right angles as the figure has fides. For For any reftilineal figure ABCDE can be divided into as many triangles as the figure has... | |
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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 sides. 
