Elements of GeometryHilliard, Gray,, 1841 - 235 páginas |
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Página iii
... forming properly a supplement to this arithmetic , is prefixed to the work , under the title of an Introduction . The parts omitted in the first edition of this translation on spherical isoperimetrical polygons , and on the regular poly ...
... forming properly a supplement to this arithmetic , is prefixed to the work , under the title of an Introduction . The parts omitted in the first edition of this translation on spherical isoperimetrical polygons , and on the regular poly ...
Página x
... formed by the multiplication of three equal factors ; each of these factors is the cube root of this product ; 125 is the product of 5 multiplied twice by itself , or 5 × 5 × 5 ; and 5 is the cube root of 125 . In general , A2 , being ...
... formed by the multiplication of three equal factors ; each of these factors is the cube root of this product ; 125 is the product of 5 multiplied twice by itself , or 5 × 5 × 5 ; and 5 is the cube root of 125 . In general , A2 , being ...
Página 5
... formed on the same side of the straight Fig . 34 . line BF , are together equal to two right angles ; for their sum is equal to that of the two angles BAM , MAF ; AM being perpen- dicular to BF . THEOREM . 32. Two straight lines , which ...
... formed on the same side of the straight Fig . 34 . line BF , are together equal to two right angles ; for their sum is equal to that of the two angles BAM , MAF ; AM being perpen- dicular to BF . THEOREM . 32. Two straight lines , which ...
Página 6
... formed about a point by two straight lines which cut each other , are together equal to four right angles ; for the angles ACE , BCE , taken together , are equal to two right angles ; also the other angles ACD , BCD , are together equal ...
... formed about a point by two straight lines which cut each other , are together equal to four right angles ; for the angles ACE , BCE , taken together , are equal to two right angles ; also the other angles ACD , BCD , are together equal ...
Página 24
... formed by two chords , as BAC . 95. An inscribed triangle is a triangle whose three angles have their vertices in the circumference of the circle , as BAC . In common discourse , the circle is sometimes confounded with its circumference ...
... formed by two chords , as BAC . 95. An inscribed triangle is a triangle whose three angles have their vertices in the circumference of the circle , as BAC . In common discourse , the circle is sometimes confounded with its circumference ...
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Términos y frases comunes
ABC fig adjacent angles altitude angle ACB angle BAC base ABCD bisect centre chord circ circular sector circumference circumscribed common cone consequently construction convex surface Corollary cube cylinder Demonstration diagonals diameter draw drawn equal angles equiangular equilateral equivalent faces figure formed four right angles frustum GEOM given point gles greater hence homologous sides hypothenuse inclination intersection isosceles triangle join less Let ABC let fall Let us suppose line AC mean proportional measure the half meet multiplied number of sides oblique lines opposite parallelogram parallelopiped perimeter perpendicular plane MN polyedron prism produced proposition radii radius ratio rectangle regular polygon right angles Scholium sector segment semicircle semicircumference side BC similar solid angle sphere spherical polygons spherical triangle square described straight line tangent THEOREM third three angles triangle ABC triangular prism triangular pyramids vertex vertices whence
Pasajes populares
Página 67 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Página 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.
Página 65 - 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'.
Página 160 - ABC (fig. 224) be any spherical triangle ; produce the sides AB, AC, till they meet again in D. The arcs ABD, ACD, will be...
Página 168 - In any spherical triangle, the greater side is opposite the greater angle ; and conversely, the greater angle is opposite the greater side.
Página 157 - 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.
Página 8 - Any side of a triangle is less than the sum of the other two sides...
Página 82 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Página 29 - Two equal chords are equally distant from the centre ; and of two unequal chords, the less is at the greater distance from the centre.
Página 182 - 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.