Elements of Geometry and Conic SectionsHarper & Brothers, 1857 - 226 sider |
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Side 5
... Spherical Geometry . Moreover , the additions are often incongruous with the original text ; so that most of those who adhere to the use of Playfair's Euclid , will admit that something is still wanting to a perfect treatise . At most ...
... Spherical Geometry . Moreover , the additions are often incongruous with the original text ; so that most of those who adhere to the use of Playfair's Euclid , will admit that something is still wanting to a perfect treatise . At most ...
Side 7
... Spherical Geometry 148 BOOK X. The Three round Bodies . 166 Parabola Ellipse Hyperbola CONIC SECTIONS . 177 188 . 205 N.B. When reference is made to a Proposition in the same Book , only the number of the Proposition is given ; but when ...
... Spherical Geometry 148 BOOK X. The Three round Bodies . 166 Parabola Ellipse Hyperbola CONIC SECTIONS . 177 188 . 205 N.B. When reference is made to a Proposition in the same Book , only the number of the Proposition is given ; but when ...
Side 147
... having a greater number of sides . Hence there can be but five regular polyedrons ; three formed with equilateral triangles , one with squares , and one with pentagons . BOOK IX . SPHERICAL GEOMETRY Definitions . 1. A sphere. BOOK VIII .
... having a greater number of sides . Hence there can be but five regular polyedrons ; three formed with equilateral triangles , one with squares , and one with pentagons . BOOK IX . SPHERICAL GEOMETRY Definitions . 1. A sphere. BOOK VIII .
Side 148
... spherical triangle is a part of the sur- face of a sphere , bounded by three arcs of great circles , each of which ... spherical triangle is called right - angled , isosceles , or equilateral , in the same cases as a plane triangle . 8 ...
... spherical triangle is a part of the sur- face of a sphere , bounded by three arcs of great circles , each of which ... spherical triangle is called right - angled , isosceles , or equilateral , in the same cases as a plane triangle . 8 ...
Side 149
... spherical wedge , or ungula , is that portion of the sphere included between the same semicir- cles , and has the lune for its base . 11. A spherical pyramid is a portion of the sphere included between the planes of a solid angle ...
... spherical wedge , or ungula , is that portion of the sphere included between the same semicir- cles , and has the lune for its base . 11. A spherical pyramid is a portion of the sphere included between the planes of a solid angle ...
Vanlige uttrykk og setninger
ABCD AC is equal allel altitude angle ABC angle ACB angle BAC base BCDEF bisected chord circle circumference cone convex surface curve described diameter dicular draw drawn ellipse equal angles equal to AC equally distant equiangular equivalent exterior angle foci four right angles frustum given angle greater Hence Prop hyperbola inscribed intersection join latus rectum less Let ABC lines AC major axis mean proportional measured by half meet number of sides ordinate parabola parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN principal vertex prism PROPOSITION pyramid radii radius ratio rectangle regular polygon right angles Prop Scholium segment side BC similar similar triangles solid angle sphere spherical triangle square subtangent tangent THEOREM triangle ABC triangle DEF vertex vertices VIII
Populære avsnitt
Side 17 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Side 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
Side 63 - IF a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the' rectangle contained by the parts.
Side 18 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Side 101 - When you have proved that the three angles of every triangle are equal to two right angles...
Side 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Side 37 - Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third.
Side 32 - 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.
Side 15 - Wherefore, when a straight line, &c. QED PROP. XIV. THEOR. If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Side 30 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles; and the three interior angles of every triangle are together equal to two right angles.