An Elementary Geometry

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Thompson, 1872 - 110 pagina's
 

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Pagina 25 - Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth.
Pagina 30 - If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d = e :f Now ab = ab (1) and by Theorem I.
Pagina 27 - If the product of two quantities is equal to the product of two others, the...
Pagina 43 - The area of a regular polygon is equal to half the product of its perimeter and apothem.
Pagina 11 - 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 are equal in all respects.
Pagina 23 - If two triangles have two sides of one respectively equal to two sides of the other, but the third sides unequal...
Pagina 20 - ... polygon, is equal to twice as many right angles as the polygon has sides minus two.
Pagina 49 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Pagina 70 - A right cylinder is a solid described by the revolution of a rectangle about one of its sides.
Pagina 64 - DEFINITIONS. 1 . A straight line is perpendicular to a plane, when it is perpendicular to every straight line of the plane which it meets.

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