| Edward Wells - Arithmetic - 1714 - 292 pages
...th«i Sum of all the Angles in all the Tri* angles, into which the Figure is divided, will together **be equal to twice as many right Angles, as the Figure has** Sidesj But the Angles about P, the inward Point of each Figure, wherein all fhe Triangles concur, are... | |
| Edward Wells - Arithmetic - 1723 - 294 pages
...Right-, 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... | |
| Euclid - Geometry - 1765 - 464 pages
...is, has fides. But fince all the inward angles together, with four right angles, has been proved to **be equal to twice as many right angles as the figure has** fides ; therefore all the inward angles, together with four right angles, is equal to all the inward... | |
| Thomas Malton - 1774 - 482 pages
...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... | |
| Charles Hutton - Measurement - 1788 - 728 pages
...prove the 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... | |
| Mathematics - 1801 - 658 pages
...the work ;• add all the inward angles A, B, C, &c. together, and when the work is right, their sum **will be equal to twice as many right angles, as the figure has sides,** wanting four right angles. And when there is an angle, as F, that bends inward, and you measure the... | |
| Thomas Hodson - Arithmetic - 1806 - 492 pages
...prove the work ; — add all the inward angles ABC, &c. together ; and if the work be right, the fum **will be equal to twice as many right angles as the figure has** fides, except four right angles ; but when there is an angle that bends inwards, as at F, and you meafure... | |
| John Playfair - Euclid's Elements - 1806 - 320 pages
...if a side of a triangle, &c. QED "7^ COR. 1. All the interior angles of any rectilineal figure are **equal to twice as many right angles as the figure has sides,** wanting four right angles. For any rectilineal figure ABCDE can be divided into as many triangles as... | |
| Robert Simson - Trigonometry - 1806 - 518 pages
...D, CoR. 1 . 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.** For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by... | |
| Charles Hutton - Mathematics - 1807
...work ; add all the inward angles A, B, c, &c, together ; for when the work is right, their sum will ba **equal to twice as many right angles as the figure has sides,** wanting 4 right angles. But when there is an angle, as F, that bends inwards, and you measure the external... | |
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