Elements of Geometry and Trigonometry: From the Works of A.M. Legendre |
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Page 36
... hypothenuse and a side of the one equal to the hypothenuse and a side of the other , each to each , the triangles will be equal in all their parts . A Let the right - angled tri- angles ABC and DEF have the hypothenuse AC equal to DF ...
... hypothenuse and a side of the one equal to the hypothenuse and a side of the other , each to each , the triangles will be equal in all their parts . A Let the right - angled tri- angles ABC and DEF have the hypothenuse AC equal to DF ...
Page 64
... hypothenuse CA equal to CB , and the side CD common ; the triangles are , therefore , parts hence , AD is equal to DB . Α equal in all their Again , because CG is perpendicular to AB , at its middle point , 64 GEOMETRY .
... hypothenuse CA equal to CB , and the side CD common ; the triangles are , therefore , parts hence , AD is equal to DB . Α equal in all their Again , because CG is perpendicular to AB , at its middle point , 64 GEOMETRY .
Page 90
... hypothenuse AC , and the side BC equal to DC ; and consequently , they are equal in all their parts ( B. I. , P. XVII . ) : hence , AB is equal to AD , and the angle CAB is equal to the angle CAD . gents are therefore equal , and the ...
... hypothenuse AC , and the side BC equal to DC ; and consequently , they are equal in all their parts ( B. I. , P. XVII . ) : hence , AB is equal to AD , and the angle CAB is equal to the angle CAD . gents are therefore equal , and the ...
Page 104
... hypothenuse of a right - angled triangle , is equal to the sum of the squares described on the other two sides . Let ABC be a triangle , right - angled at A : then will BC2 = AB2 + AC2 . Construct the square BG on the side BC , the ...
... hypothenuse of a right - angled triangle , is equal to the sum of the squares described on the other two sides . Let ABC be a triangle , right - angled at A : then will BC2 = AB2 + AC2 . Construct the square BG on the side BC , the ...
Page 105
... hypothenuse diminished by the square of the other side : thus , = AB2 BC2 AC2 ; - or , 2 = AC BC — AB2 . - Cor . 2. If from the vertex of the right angle , a per- pendicular be drawn to the hypothenuse , dividing it into two segments ...
... hypothenuse diminished by the square of the other side : thus , = AB2 BC2 AC2 ; - or , 2 = AC BC — AB2 . - Cor . 2. If from the vertex of the right angle , a per- pendicular be drawn to the hypothenuse , dividing it into two segments ...
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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.