Elements of Geometry and TrigonometryA. S. Barnes and Company, 1838 - 269 σελίδες |
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Σελίδα 4
... becomes a circle , and this principle is made the basis of several important de- monstrations in Book VIII . Book II . , on Ratios and Proportions , has been partly adopted from the Encyclopedia Metropolitana , and will , it is believed ...
... becomes a circle , and this principle is made the basis of several important de- monstrations in Book VIII . Book II . , on Ratios and Proportions , has been partly adopted from the Encyclopedia Metropolitana , and will , it is believed ...
Σελίδα 12
... becomes evident by means of a train of reasoning called a demonstration . A problem is a question proposed , which requires a solu- tion . A lemma is a subsidiary truth , employed for the demonstra- tion of a theorem , or the solution ...
... becomes evident by means of a train of reasoning called a demonstration . A problem is a question proposed , which requires a solu- tion . A lemma is a subsidiary truth , employed for the demonstra- tion of a theorem , or the solution ...
Σελίδα 15
... becoming CD , the other CE . From the point C draw the line CF , making with AC the right angle ACF . Now , since ACD is a straight line , the angle FCD will be a right angle ( Prop . I. Cor . 1. ) ; and since ACE is a straight line ...
... becoming CD , the other CE . From the point C draw the line CF , making with AC the right angle ACF . Now , since ACD is a straight line , the angle FCD will be a right angle ( Prop . I. Cor . 1. ) ; and since ACE is a straight line ...
Σελίδα 73
... becomes absolute : the number 30 , for instance , by which the rectangle A was measured , now represents 30 superficial units , or 30 of those squares , which have each of their sides equal to unity , as the diagram exhibits . In ...
... becomes absolute : the number 30 , for instance , by which the rectangle A was measured , now represents 30 superficial units , or 30 of those squares , which have each of their sides equal to unity , as the diagram exhibits . In ...
Σελίδα 76
... become squares , and the square described on the whole line would be equivalent to four times the square described on half the line . Scholium . This property is equivalent to the property de- monstrated in algebra , in obtaining the ...
... become squares , and the square described on the whole line would be equivalent to four times the square described on half the line . Scholium . This property is equivalent to the property de- monstrated in algebra , in obtaining the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
adjacent altitude angle ACB ar.-comp base multiplied bisect Book VII centre chord circ circumference circumscribed common cone consequently convex surface cosine Cotang cylinder diagonal diameter dicular distance divided draw drawn equal angles equally distant equations equivalent feet figure find the area formed four right angles frustum given angle given line greater homologous sides hypothenuse inscribed circle inscribed polygon intersection less Let ABC logarithm measured by half number of sides opposite parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN polyedron polygon ABCDE PROBLEM proportional PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon right angled triangle S-ABCDE Scholium secant segment side BC similar sine slant height solid angle solid described sphere spherical polygon spherical triangle square described straight line tang tangent THEOREM triangle ABC triangular prism vertex
Δημοφιλή αποσπάσματα
Σελίδα 213 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Σελίδα 19 - 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.
Σελίδα 233 - It is, indeed, evident, that the negative characteristic will always be one greater than the number of ciphers between the decimal point and the first significant figure.
Σελίδα 241 - In every plane triangle, the sum of two sides is to their difference as the tangent of half the sum of the angles opposite those sides is to the tangent of half their difference.
Σελίδα 168 - The radius of a sphere is a straight line drawn from the centre to any point of the surface ; the diameter or axis is a line passing through this centre, and terminated on both sides by the surface.
Σελίδα 18 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.
Σελίδα 155 - AG, AK. The two solids AG, AQ having the same base AEHD, are to each other as their altitudes AB, AO. In like manner, the two solids AQ, AK having the same base AOLE, are to each other as their altitudes AD, AM. Hence we have the two proportions sol.
Σελίδα 16 - 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.
Σελίδα 32 - ... is equal to twice as many right angles as the polygon
Σελίδα 287 - How many square feet are there in the convex surface of the frustum of a square pyramid, whose slant height is 10 feet, each side of the lower base 3 feet 4 inches, and each side of the upper base 2 feet 2 inches ? Ans.