Elementary Geometry: Including Plane, Solid, and Spherical Geometry, with Practical Exercises

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Sheldon, 1883 - Geometry - 333 pages
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Page 284 - A Sphere is a solid bounded by a surface every point in which is equally distant from a point within called the Centre.
Page 132 - If two triangles have two sides of the one respectively equal to two sides of the other, and the included angles unequal, the third sides are unequal, and the greater third side belongs to the triangle having the greater included angle.
Page xii - LEMMA 4. — A common divisor of two numbers is a divisor of their sum and also of their difference.
Page 301 - 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 in all their parts." Axiom 1. "Things which are equal to the same thing, are equal to each other.
Page 296 - A spherical triangle is a portion of the surface of a sphere, bounded by three arcs of great circles.
Page 167 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Page 321 - A spherical sector is the portion of a sphere generated by the revolution of a circular sector about any diameter of the circle of which the sector is a part.
Page 104 - In an isosceles triangle the angles opposite the equal sides are equal.
Page 156 - Theorem. — The area of a trapezoid is equal to the product of its altitude...

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