Elements of Geometry |
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This is not Legendre's 'Elements'.
Contents
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Common terms and phrases
according algebraic angle applied arrangements becomes called coefficient common consequently considered consists contains courier cube Demonstration denominator denoted determine divided dividend division divisor double employed enunciation equal equation evident example exponent expression extract factors figures follows four fraction given gives greater greatest indicated known less letters logarithm manner means measure method multiplied necessary negative observed obtain operation performed perpendicular positive preceding present problem proportion proposed proposed equation question quotient radical reduced reference remainder represented resolve respect result right angles root rule side simple solution sought square square root straight line substituting subtract successively suppose taken tens term third tion triangle units unity unknown quantity whence whole write
Popular passages
Page 9 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Page 44 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
Page 63 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.
Page 101 - Which proves that the square of a number composed of tens and units, contains the square of the tens plus twice the product of the tens by the units, plus the square of the units.
Page 8 - Any side of a triangle is less than the sum of the other two sides...
Page 122 - ... is negative in the second member, and greater than the square of half the coefficient of the first power of the unknown quantity, this equation can have only imaginary roots.
Page 180 - CD, &c., taken together, make up the perimeter of the prism's base : hence the sum of these rectangles, or the convex surface of the prism, is equal to the perimeter of its base multiplied by its altitude.
Page 54 - The sum of the squares on the sides of a parallelogram is equal to the sum of the squares on the diagonals.
Page 185 - The convex surface of a cone is equal to the circumference of the base multiplied by half the slant height.
Page 164 - If two triangles have two sides and the inchtded angle of the one respectively equal to two sides and the included angle of the other, the two triangles are equal in all respects.
Bibliographic information
| Title | Elements of Geometry |
| Author | Adrien Marie Legendre |
| Edition | 2 |
| Publisher | Hilliard and Metcalf, 1825 |
| Original from | Harvard University |
| Digitized | 20 Feb 2007 |
| Length | 224 pages |
| Export Citation | BiBTeX EndNote RefMan |