Elements of Geometry and Trigonometry: From the Works of A.M. Legendre |
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Page 26
... example , there will remain ( A. 5 ) , AC - BC < AB ; as BC , for that is , the difference between any two sides of a triangle is less than the third side . Scholium . In order that any three given lines may re- present the sides of a ...
... example , there will remain ( A. 5 ) , AC - BC < AB ; as BC , for that is , the difference between any two sides of a triangle is less than the third side . Scholium . In order that any three given lines may re- present the sides of a ...
Page 74
... example , that this unit is contained 7 times in the angle ACB , and 4 times in the angle DOE ACB be divided into 7 angles , by the radii Then , suppose Cm , Cn , Cp , & c .; and DOE into 4 angles , by the radii Or , Oy , and Oz , each ...
... example , that this unit is contained 7 times in the angle ACB , and 4 times in the angle DOE ACB be divided into 7 angles , by the radii Then , suppose Cm , Cn , Cp , & c .; and DOE into 4 angles , by the radii Or , Oy , and Oz , each ...
Page 193
... example , that AE is to AI , as 15 is to 8 . Conceive AE to be divided into 15 equal parts , of which AI will contain 8 ; through the points of division let planes be passed parallel to ABCD . These planes will and equal altitudes ...
... example , that AE is to AI , as 15 is to 8 . Conceive AE to be divided into 15 equal parts , of which AI will contain 8 ; through the points of division let planes be passed parallel to ABCD . These planes will and equal altitudes ...
Page 252
... example , let them be to each other as 5 is to 48. Divide the circumference MNPQ into 48 equal parts , be- ginning at M ; MN will contain five of these parts . Join each point M of division with the points A and B , by a quadrant ...
... example , let them be to each other as 5 is to 48. Divide the circumference MNPQ into 48 equal parts , be- ginning at M ; MN will contain five of these parts . Join each point M of division with the points A and B , by a quadrant ...
Page 11
... , and take their sum , then find the number corresponding to the resulting logarithm , and it will be the product required . EXAMPLES . 1. Multiply 23.14 by 5.062 . log 23.14 TRIGONOMETRY . 11 Multiplication by Logarithms, 11.
... , and take their sum , then find the number corresponding to the resulting logarithm , and it will be the product required . EXAMPLES . 1. Multiply 23.14 by 5.062 . log 23.14 TRIGONOMETRY . 11 Multiplication by Logarithms, 11.
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Common terms and phrases
AB² ABCD AC² adjacent angles altitude apothem Applying logarithms base and altitude bisect centre chord circle circumference circumscribed coincide cone consequently convex surface corresponding cosec cosine Cotang cylinder denote diagonals diameter difference distance divided draw drawn edges equally distant feet find the area Formula frustum given angle given straight line greater hence homologous hypothenuse included angle interior angles intersection less Let ABC log sin lower base mantissa measured by half number of sides opposite parallel parallelogram parallelopipedon perimeter perpendicular plane MN polyedral angle polyedron prism PROPOSITION proved pyramid quadrant radii radius rectangle regular polygons right angles right-angled triangle Scholium secant segment semi-circumference side BC similar sine slant height sphere spherical polygon spherical triangle square subtracted Tang tangent THEOREM triangle ABC triangular prisms triedral angle upper base vertex vertices whence
Popular passages
Page 126 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Page 59 - A'B'C', and applying the law of cosines, we have cos a' = cos b' cos c' + sin b' sin c' cos A'. Remembering the relations a' = 180° -A, b' = 180° - B, etc. (this expression becomes cos A = — cos B cos C + sin B sin C cos a.
Page 18 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Page 104 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.
Page 6 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 28 - If two triangles have two sides of the one equal to two sides of the...
Page 46 - 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.
Page 99 - The area of a parallelogram is equal to the product of its base and altitude.
Page 172 - If two planes are perpendicular to 'each other, a straight line drawn in one of them, perpendicular to their intersection, will be perpendicular to the other.
Page 214 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.