Mathematics for Practical Men: Being a Commonplace Book of Principles, Theorems, Rules and Tables in Various Departments of Pure and Mixed Mathematics, with Their Most Useful Applications; Especially to the Pursuits of Surveyors, Architects, Mechanics and Civil Engineers

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Baldwin, Cradock, and Joy, 1825 - 411 páginas
 

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Página 111 - Straight lines are said to be equally distant from the centre of a circle, when the perpendiculars drawn to them from the centre are equal.
Página 40 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.
Página 109 - Theorem. — The sum of all the angles of a polygon is equal to twice as many right angles as the polygon has sides, less two.
Página 136 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES ; TO THE TANGENT OF HALF THEIR DIFFERENCE.
Página 112 - If from a point within a circle more than two equal straight lines can be drawn to the circumference, that point is the centre of the circle.
Página 278 - ... it is equal to the weight of a column of the fluid, whose base is the plane, and height — . And, in a globe, it is but half 64 so much.
Página 339 - ... 2. The load at the maximum is nearly, but somewhat less than, as the square of the velocity of the wind ; the shape and position of the sails being the same.
Página 132 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc.
Página 41 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Página 386 - the modulus of elasticity of a substance"" as "a column of the same substance capable of producing a pressure on its base which is to the weight causing a certain degree of compression, as the length of the substance is to the diminution of its length.

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