Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books
" The sum of the three angles of any triangle is equal to two right angles. "
Chauvenet's Treatise on Elementary Geometry - Page 38
by William Chauvenet, William Elwood Byerly - 1887 - 322 pages
Full view - About this book

A Course of Mathematics: For the Use of Academies as Well as Private Tuition

Charles Hutton - Mathematics - 1812 - 620 pages
...which some property is asserted, and the truth of it required to be proved. Thus, when it is said that, The sum of the three angles of any triangle is equal to two right angles, this is a Theorem, the truth of which is demonstrated by Geometry. — A set or collection of such...
Full view - About this book

A Course of Mathematics: For the Use of Academies, as Well as Private ...

Charles Hutton - Mathematics - 1822 - 616 pages
...some property is asserted, and the truth of it required to be .proved. Thus, when it is said that, The sum of the three angles of any triangle is equal to two right angles, this is a Theorem, the truth of which is demonstrated by Geometry. — A set or collection of such...
Full view - About this book

The First Six Books of the Elements of Euclid, with a Commentary and ...

Euclid, Dionysius Lardner - Euclid's Elements - 1828 - 542 pages
...thing, all the three, BAC, ABC, ACB, are together equal to two right angles ; hence in every triangle, the sum of its three angles is equal to two right angles.' It thus appears, that the theorem in question does not depend, when considered a priori, upon any series...
Full view - About this book

Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1828 - 346 pages
...thing, all the three BAC, ABC, ACB are together equal to two right angles ; hence in every triangle, the sum of its three angles is equal to two right angles. It thus appears, that the theorem in question does not depend, when considered a priori, upon any series...
Full view - About this book

Elements of Geometry with Notes

John Radford Young - Geometry, Modern - 1833 - 238 pages
...thing, all the three, BAG, ABC, ACB, are together equal to two right angles ; hence, in every triangle, the sum of its three angles is equal to two right angles." This theorem is sufficient to remove the difficulty in the theory of parallels, as will be afterwards...
Full view - About this book

Introductory Discourse, and the Lectures Delivered Before the ..., Volume 5

American Institute of Instruction - Education - 1835 - 318 pages
...work, this author has pursued a different method in regard to parallel lines, by first proving that the sum of the three angles of any triangle is equal to two right angles ; but the demonstration is tedious and difficult for beginners, and is therefore rarely understood....
Full view - About this book

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1836 - 394 pages
...equal to two right angles. PROPOSITION XXV. THEOREM. In every triangle the sum of the three angles is equal to two right angles. Let ABC be any triangle : then will the an- R glc C + A + B be equal to two right angles. For, produce the side CA towards D, and...
Full view - About this book

An Elementary Treatise on Plane and Solid Geometry

Benjamin Peirce - Geometry - 1837 - 216 pages
...perpendicular to its base, divides it, by art. 57, into the two equal triangles ABC and ABG. 64. Theorem. The sum of the three angles of any triangle is equal to two right angles. Demonstration. Let ABC (fig. 36) be the given triangle. Produce AC to D, and draw CE parallel to AB....
Full view - About this book

A Treatise on Algebra

Elias Loomis - Algebra - 1846 - 380 pages
...statement of some property, the truth of which is required to be proved. Thus when it is said that the sum of the three angles of any triangle is equal to two right angles, this is a theorem, the truth of which is demonstrated by Geometry. (8.) A. problem is a question requiring...
Full view - About this book

A Treatise on Algebra

Elias Loomis - Algebra - 1846 - 376 pages
...statement of some property, the truth of which is required to be proved. Thus when it is said that the sum of the three angles of any triangle is equal to two right angles, this is a theorem, the truth of which is demonstrated by Geometry. (8.) A problem is a question requiring...
Full view - About this book




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