| Elizabethan club - 1880
...acute angles at the other point, and similarly of the obtuse angles. 3. All the angles of a rectilineal **figure, together with four right angles, are equal to twice as many right angles as the figure has** sides. A floor has to be laid with tiles in the form of regular figures all equal and similar ; show... | |
| John Henry Robson - 1880
...Fourth Book. 12. By Euc. I. 32, Cor. 1, it is proved that " 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." If, therefore, we suppose the polygon to have n sides, All its interior angles + 4.90 .=... | |
| Oxford univ, local exams - 1880
...a circle, and by a straight line placed in a circle. 2. 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. 3. If the square described on one side of a triangle be equal to the squares described on the... | |
| Sir Norman Lockyer - 1880
...the flat angle we may take Theorem XXVI. of the syllabus, that the interior angles of any polygon, **together with four right angles, are equal to twice as many right angles as the figure has** sides. In the new notation we would say that the sum of the interior angles of the polygon is equal... | |
| Elias Loomis - 1880 - 443 Seiten
...is the complement of the other. PROPOSITION XXVIII. THEOREM. All the interior angles of a polygon, **together with four right angles, are equal to twice as many right angles as the figure** IMS sides. Let ABCDE be any polygon ; then all its interior angles A, B, C, D, E, together with four... | |
| Isaac Todhunter - 1880 - 114 Seiten
...Similarly AD is equal to FC. 47. The figure has eight equal sides, and eight equal angles : the interior **angles of the figure together with four right angles are equal to** sixteen right angles : therefore all the interior angles of the figure are equal to twelve right angles,... | |
| Thomas Holloway (surveyor.) - 1881
...four right angles or three hundred and sixty degrees. 3. 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. Although further systems of proof could easily be quoted, I consider the foregoing quite sufficient... | |
| Thomas Newton Andrews - 1881 - 160 Seiten
...— In Euclid, Book I., Prop, xxxi11., it is proved that "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." If we have to describe a pentagon on the base AB, we must first calculate the angles at the... | |
| John Gibson - 1881
...greater side, or has the greater side opposite to it. 3. 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. 4. Describe a parallelogram that shall be equal to a given triangle BCD, and have one of its... | |
| 1882
...also equal, the triangles must be equal in every respect. 4 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. 5. Equal triangles upon equal bases in the same straight line and towards the same parts are... | |
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