Elements of Geometry and Trigonometry |
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Page 4
... polygon and circle may be made to coincide so nearly , as to differ from each other by less than any assignable quantity , has been taken from the Edinburgh Encyclopedia . It is proved in the corollaries that a polygon of an infinite ...
... polygon and circle may be made to coincide so nearly , as to differ from each other by less than any assignable quantity , has been taken from the Edinburgh Encyclopedia . It is proved in the corollaries that a polygon of an infinite ...
Page 5
... Polygons and the Measurement of the Circle , 109 BOOK VI . Planes and Solid Angles , 126 BOOK VII . Polyedrons , 142 BOOK VIII . The three round bodies , 19 166 BOOK IX . Of Spherical Triangles and Spherical Polygons , The regular ...
... Polygons and the Measurement of the Circle , 109 BOOK VI . Planes and Solid Angles , 126 BOOK VII . Polyedrons , 142 BOOK VIII . The three round bodies , 19 166 BOOK IX . Of Spherical Triangles and Spherical Polygons , The regular ...
Page 10
... polygon , and the lines themselves , taken together , form the contour , or perimeter of the polygon . B A D A -B 14. The polygon of three sides , the simplest of all , is called a triangle ; that of four sides , a quadrilateral ; that ...
... polygon , and the lines themselves , taken together , form the contour , or perimeter of the polygon . B A D A -B 14. The polygon of three sides , the simplest of all , is called a triangle ; that of four sides , a quadrilateral ; that ...
Page 11
... polygon is one which has all its sides equal ; an equiangular polygon , one which has all its angles equal . 20. Two polygons are mutually equilateral , when they have their sides equal each to each , and placed in the same order ; that ...
... polygon is one which has all its sides equal ; an equiangular polygon , one which has all its angles equal . 20. Two polygons are mutually equilateral , when they have their sides equal each to each , and placed in the same order ; that ...
Page 30
... polygon , is equal to two right angles , taken as many times less two , as the figure has sides . Let ABCDEFG be the proposed polygon . If from the vertex of any one angle A , diagonals g AC , AD , AE , AF , be drawn to the vertices of ...
... polygon , is equal to two right angles , taken as many times less two , as the figure has sides . Let ABCDEFG be the proposed polygon . If from the vertex of any one angle A , diagonals g AC , AD , AE , AF , be drawn to the vertices of ...
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Common terms and phrases
adjacent altitude angle ACB ar.-comp base multiplied bisect Book VII centre chord circ circumference circumscribed common cone consequently convex surface cosine Cotang cylinder diagonal diameter dicular distance divided draw drawn equally distant equations equivalent feet figure find the area formed four right angles frustum given angle given line greater homologous sides hypothenuse inscribed circle inscribed polygon intersection less Let ABC logarithm measured by half number of sides opposite parallelogram parallelopipedon pendicular perimeter perpen perpendicular perpendicular let fall plane MN polyedron polygon ABCDE PROBLEM PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon right angled triangle S-ABCDE Scholium secant segment side BC similar sine slant height solid angle solid described sphere spherical polygon spherical triangle square described straight line tang tangent THEOREM triangle ABC triangular prism vertex
Popular passages
Page 241 - In every plane triangle, the sum of two sides is to their difference as the tangent of half the sum of the angles opposite those sides is to the tangent of half their difference.
Page 18 - If two triangles have two sides of the one equal to two sides of the...
Page 233 - It is, indeed, evident, that the negative characteristic will always be one greater than the number of ciphers between the decimal point and the first significant figure.
Page 168 - The radius of a sphere is a straight line drawn from the centre to any point of the surface ; the diameter or axis is a line passing through this centre, and terminated on both sides by the surface.
Page 18 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.
Page 225 - B) = cos A cos B — sin A sin B, (6a) cos (A — B) = cos A cos B + sin A sin B...
Page 20 - In an isosceles triangle the angles opposite the equal sides are equal.
Page 86 - 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 159 - S-o6c be the smaller : and suppose Aa to be the altitude of a prism, which having ABC for its base, is equal to their difference. Divide the altitude AT into equal parts Ax, xy, yz, &c. each less than Aa, and let k be one of those parts ; through the points of division...
Page 168 - CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.