| Euclides - 1881
...(Ax. 1) to two right angles. Wherefore, if a side of any triangle be produced, &c. a ED COR. 1. — **All the interior angles of any rectilineal figure...twice as many right angles as the figure has sides.** Let ABCDE be any rectilineal figure. All the interior angles ABC, BCD, &c. together with four right... | |
| Thomas Holloway (surveyor.) - 1881
...four-sided rectilineal figure is equal to four right angles or three hundred and sixty degrees. 3. **All the interior angles of any rectilineal figure,...twice as many right angles as the figure has sides.** Although further systems of proof could easily be quoted, I consider the foregoing quite sufficient... | |
| Education, Higher - 1881
...to the hypotenuse and one side of the other, the triangles are equal in every respect. 4 The sum of **the interior angles of any rectilineal figure together with four right angles,** equals twice as many right angles as the figure has sides. 5. Equal triangles upon equal bases in the... | |
| Education, Higher - 1882
...and the side opposite to the equal .es also equal, the triangles must be equal in every respect. 4 **All the interior angles of any rectilineal figure...twice as many right angles as the figure has sides.** 5. Equal triangles upon equal bases in the same straight line and towards the same parts are between... | |
| 1882
...is 60°, or 66* 66' 66"-6. In corollaries to the same proposition it is shown that all the internal **angles of any rectilineal figure, together with four...twice as many right angles as the figure has sides** ; also, that all the external angles of any rectilineal figure formed by producing the sides in the... | |
| 1882
...triangle are equal to two right angles; and that all the interior angles of any rectilineal n'gure, **together with four right angles, are equal to twice as many right angles as the figure has sides.** 3. If the square described upon one of the sides of a triangle is equal to the squares described upon... | |
| Marianne Nops - 1882
...two-thirds of a right angle or 60°. III. All the interior angles of any rectilineal figure added to **four right angles are equal to twice as many right angles as the figure has sides.** Now, any figure can be divided into as many triangles as it has sides by drawing lines from each of... | |
| Joseph Hughes - Education - 1883
...read out by the Inspector. Euclid. [AH generally understood abbreviations for words may be used.] 1. **All the interior angles of any rectilineal figure...twice as many right angles as the figure has sides.** See Corollary to Euclid I. 32. If the figure be equiangular and four interior angles be equal to seven... | |
| Moffatt and Paige - 1883
...are equal to two right angles (Ax. 1). Therefore, if a side of any triangle be produced, etc. COR. 1. **All the interior angles of any rectilineal figure,...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... | |
| Education - 1883
...the passage read out by Euclid. [All generally understood abbreviations for irorJs may be used.] 1. **All the interior angles of any rectilineal figure...twice as many right angles as the figure has sides.** See Corollary to Euclid I. 32. If the figure be equiangular and four interior angles be e ]ual to seven... | |
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