Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books
" 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. "
The Elements of Euclid: Viz, the First Six Books, Together with the Eleventh ... - Page 33
by Euclid, Robert Simson - 1829 - 516 pages
Full view - About this book

Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 238 pages
...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. 3) ; and...
Full view - About this book

The English Journal of Education, Volume 5

Education - 1851 - 502 pages
...three pickmen to every two shovellers, and to each workman 2s. 6d. per day. EUCLID. SECTION I.—1. All the interior angles of any rectilineal figure,...twice as many right angles as the figure has sides. SECTION II. — I. If a straight line drawn through the centre of a circle cuts another at right angles...
Full view - About this book

Plane trigonometry. [With] Solutions of examples. Appendix &c., to adapt the ...

John William Colenso (bp. of Natal.) - 1851 - 382 pages
...such cases, where very great accuracy is not required. 16. It appears, from Eue. i. 32, Cor. 1, that ' all the interior angles of any rectilineal figure,...twice as many right angles as the figure has sides.' Hence if и be the number of sides of any rectilineal figure, we have the sum of its n angles + 4 x...
Full view - About this book

A Manual of Surveying for India, Detailing the Mode of Operations on the ...

Sir Henry Edward Landor Thuillier - Surveying - 1851 - 826 pages
...passing through the other end. In the 3rd Cor. Theor. V., (page 12,) it is stated and proved, " that all the interior angles of any rectilineal figure,...twice as many right angles as the figure has sides" or in other words that — In any rectilineal figure, the sum of all the interior angles, is equal...
Full view - About this book

Fortification for officers of the army and students of military history

sir Henry Yule - 1851 - 282 pages
...polygon may be found from the property of such figures, that the sum of the angles of any polygon is equal to twice as many right angles as the figure has sides, less four. The following technical terms require explanation : — A Salient Angle is one directed...
Full view - About this book

An Epitome of Navigation and Nautical Astronomy, with Improved Lunar Tables ...

Janet Taylor - Nautical astronomy - 1851 - 674 pages
...being the two angles made by cne line meeting another. The sum of all the outward and inward angles, is equal to twice as many right angles as the figure has sides; but the sum of all the inward angles is equal to twice as man1 right angles as the figure has sides,...
Full view - About this book

The Elements of Euclid [book 1] for beginners, by J. Lowres

Euclides - 1852 - 48 pages
...produced be equal to the base, and joining the end of the produced line to the end of the base. COB. 3. All the interior angles of any rectilineal figure,...twice as many right angles as the figure has sides. COB. 4. All the exterior angles of any rectilineal figure are together equal to four right angles....
Full view - About this book

The first two books of the Elements of Euclid, with additional figures ...

Euclides - 1852 - 152 pages
...that is a , together with four right angles. . 2 Cor Therefore all the angles of the figure, XT - *• together with four right angles, are equal to twice as many right angles as the figure has sides. [The triangle furnishes an instance of this, for all its angles are together equal to two right angles;...
Full view - About this book

The English Journal of Education, Volume 6

Education - 1852 - 512 pages
...EUCLID. SECTION I. — 1. The angles at the base of an isosceles triangle are equal to each other. 2. All the interior angles of any rectilineal figure,...together with four right angles, are equal to twice us many right angles as the figure has sides. 3. To a given straight line to apply a parallelogram...
Full view - About this book

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1852 - 436 pages
...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...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF