 | Edward Laurence - 1716 - 408 sider
...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 (by the... | |
 | Robert Simson - 1762 - 488 sider
...at the «. t (,„,. point F which is the common Vertex of the triangles ; that is ", toM. i. gether with four right angles. Therefore all the angles of...twice as many right angles as the figure has fides. C o R. 2 . All the exterior angles of any rectilineal figure are together equal to four right angles.... | |
 | Euclid - 1765 - 492 sider
...fpoken of, is equal to two right angles, all the angles of tiie figure, together with thefe outward angles, are equal to twice as many right angles as the figure has angles, that is, has fides. But fince all the inward angles together, with four right angles, has been... | |
 | Thomas Malton - 1774 - 484 sider
...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.... | |
 | Euclid - 1781 - 552 sider
...F, which is the common vertex of the triangles; that isa, together with four right angles. Thprefpre all the angles of the figure, together with four right...has fides. CoR. 2. All the exterior angles of any rectilineal figure, arc together equal to four right angle*. Becaufe every interior angle ABC, with... | |
 | Robert Simson - 1781 - 534 sider
...with the angles at aa Cor. the point F which is the common Vertex of the triangles ; that is*, *s ', together with four right angles. Therefore all the...twice as many right angles as the figure has fides. Cou. 2. All the exterior angles of any rectilineal figure are together equal to four right angles.... | |
 | Charles Hutton - 1788 - 728 sider
...work ; add all the inward angles A, B, c, &c, together, and when the work is right, their fum will be equal to twice as many right angles as the figure has fides, wanting 4 right angles. And when there is an angle, as F, that bends inwards, and you meafure the external... | |
 | John McGregor (teacher of mathematics.) - 1792 - 532 sider
...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...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 - 1795 - 462 sider
...with the angles at the point F, which B the common vertex of the triangles : that is a, together witi four right angles. Therefore all the angles of the...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 - 1799 - 374 sider
...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...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 fides,... | |
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F, which is the common 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 sides. 
