Elements of Geometry and Trigonometry: From the Works of A.M. Legendre |
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Page vii
... of a Circle , 116 To find the length of an Arc , Area of a Circle , Area of a Sector , .... Area of a Segment , Area of a Circular Ring ,. 117 117 118 .... 118 119 .. PAGE . Area of the Surface of a Prism , CONTENTS . vi.
... of a Circle , 116 To find the length of an Arc , Area of a Circle , Area of a Sector , .... Area of a Segment , Area of a Circular Ring ,. 117 117 118 .... 118 119 .. PAGE . Area of the Surface of a Prism , CONTENTS . vi.
Page 59
... SEGMENT is a part of a circle included between an arc and its chord . 7. A SECTOR is a part of a circle included within an an arc and the radii drawn to its extremities . 8. An INSCRIBED ANGLE is an angle whose vertex is BOOK III The ...
... SEGMENT is a part of a circle included between an arc and its chord . 7. A SECTOR is a part of a circle included within an an arc and the radii drawn to its extremities . 8. An INSCRIBED ANGLE is an angle whose vertex is BOOK III The ...
Page 79
... segment , are equal ; because they are each measured by half of the same arc BOC . A B Cor . 2. Any angle BAD , in ... segment greater than a semi - circle , is acute ; for it is mea- sured by half the arc BOC , less than a semi ...
... segment , are equal ; because they are each measured by half of the same arc BOC . A B Cor . 2. Any angle BAD , in ... segment greater than a semi - circle , is acute ; for it is mea- sured by half the arc BOC , less than a semi ...
Page 91
... segment that shall contain a given angle . Let AB be the given line . G -D 0 . -D B K Produce AB towards D ; at B construct the angle DBE equal to the given angle draw BO perpendicular to BE , and at the middle point G , BOOK III . 91.
... segment that shall contain a given angle . Let AB be the given line . G -D 0 . -D B K Produce AB towards D ; at B construct the angle DBE equal to the given angle draw BO perpendicular to BE , and at the middle point G , BOOK III . 91.
Page 92
... segment AMB be the segment required . M G K G -D -D For , the angle ABF , equal to half of the arc AKB ( P. XXI . ) ; EBD , is measured by and the inscribed angle AMB is measured by half of the same arc : hence , the angle AMB is equal ...
... segment AMB be the segment required . M G K G -D -D For , the angle ABF , equal to half of the arc AKB ( P. XXI . ) ; EBD , is measured by and the inscribed angle AMB is measured by half of the same arc : hence , the angle AMB is equal ...
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Common terms and phrases
ABē ABCD ACē 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.