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 الكتب الكتب 81 - 90 من 194 فيTherefore all the angles of the figure, together with four right angles, are equal.... 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. A Popular Course of Pure and Mixed Mathematics ...: With Tables of ... - الصفحة 181
بواسطة Peter Nicholson - 1825 - عدد الصفحات: 372
عرض كامل - حول هذا الكتاب ELEMENTS OF GEOMETRY AND TRIGONOMETRY

A. M. LEGENDRE - 1852
...triangles in the figure ; that is, as many times as there are sides, less two. But this product is equal to twice as many right angles as the figure has sides, less four right angles. Cor. 1. The sum of the interior angles in a quadrilateral, is equal to two...
عرض كامل - حول هذا الكتاب Elements of Geometry and Trigonometry: With Applications in Mensuration

Charles Davies - 1886 - عدد الصفحات: 324
...triangles is equal to two right angles (Th. xvii) : hence, the sum of the angles of all the triangles is equal to twice as many right angles as the figure has sides. But the sum of all the angles about the point P is equal to four right angles (Th. ii. Cor. 4) ; and...
عرض كامل - حول هذا الكتاب The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853
...triangles; that is, (I. 15. Cor. 2.) together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal...twice as many right angles as the figure has sides. COK. 2. — All the exterior angles of any rectilineal figure are together equal to four right angles....
عرض كامل - حول هذا الكتاب The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853
...triangles : that is (i. 15, cor. 2), together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal...twice as many right angles as the figure has sides. Сод. 2. All the exterior angles of any rectilineal figure are together equal to four right ,ingles....
عرض كامل - حول هذا الكتاب The Elements of Euclid: With Many Additional Propositions ..., الجزء 1

Euclid - 1853 - عدد الصفحات: 136
...internal angles, are equal to twice as many right angles as the figure has sides; but the internal angles, together with four right angles, are equal to twice as many right angles as the figure has sides (6); take away from both the internal angles, and the external angles remain, equal to four right angles...
عرض كامل - حول هذا الكتاب The Elements of Euclid, books i-vi; xi. 1-21; xii. 1,2; ed. by H.J. Hose

Euclides - 1853
...the angles of the polygon together with four right angles. But all the angles of the polygon GHKLM together with four right angles are equal to twice as many right angles as the polygon has sides (i. 32. Cor. i), that is, as there are plane angles constituting the solid angle...
عرض كامل - حول هذا الكتاب The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

...angles. Wherefore, if a side of a triangle, etc. QED COR. 1. All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many D right angles as the figure has sides. E.«=^lT"\~~-^, \ 4C-\ For any rectilineal figure ABCDE can...
عرض كامل - حول هذا الكتاب Orr's Circle of the Sciences: The mathematical sciences

William Somerville Orr - 1854
...Сов. 1. — All the interior angles of any rectilineal figure, together with four right angles, are = twice as many right angles as the figure has sides. For, any rectilineal figure ABODE can be divided into as many triangles as the figure has sides, by drawing straight lines from...
عرض كامل - حول هذا الكتاب The popular educator

Popular educator - 1854
...tiungles are equal to twice as many right anales as the figure has sides. Therefore all the angles of the figure together with four right angles are equal to twice as many right ung'es as the figure has sides. Corollary 2. All the exterior angles of any rectilineal figure, made...
عرض كامل - حول هذا الكتاب A Manual for Practical Surveyors

E.W. Beans - 1854
...taken. If the entire survey has been made as above directed, the sum of all the internal angles will be equal to twice as many right angles as the figure has sides, diminished by four right angles. If this sum, as in practice will be likely to be the case, should...
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