Elements of Geometry: With Practical Applications, for the Use of Schools |
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Page v
... demonstrated by the usual method of a reductio ad absurdum , at least thirty pages more would have been necessary to obtain the same results as are here obtained . This appeared to be a sufficient reason for introducing it . Under the ...
... demonstrated by the usual method of a reductio ad absurdum , at least thirty pages more would have been necessary to obtain the same results as are here obtained . This appeared to be a sufficient reason for introducing it . Under the ...
Page ix
... demonstrated that , calling the diameter 1 , the circumference is between 30 and 35 and the principles laid down by him in this demonstration , have formed the basis of all succeeding approximations . It is generally admitted that ...
... demonstrated that , calling the diameter 1 , the circumference is between 30 and 35 and the principles laid down by him in this demonstration , have formed the basis of all succeeding approximations . It is generally admitted that ...
Page xii
... The walls of his room were literally covered with diagrams , and he had already advanced so far as to demonstrate that the three angles of a triangle are equal to two right angles , when his father discovered what xii INTRODUCTION .
... The walls of his room were literally covered with diagrams , and he had already advanced so far as to demonstrate that the three angles of a triangle are equal to two right angles , when his father discovered what xii INTRODUCTION .
Page xiv
... demonstrated , because it is self - evident . These cases are called postulates , and are the following : 1. Let it ... demonstrating the possibility or explaining the manner . Lastly Xiv INTRODUCTION .
... demonstrated , because it is self - evident . These cases are called postulates , and are the following : 1. Let it ... demonstrating the possibility or explaining the manner . Lastly Xiv INTRODUCTION .
Page xv
With Practical Applications, for the Use of Schools Timothy Walker. without demonstrating the possibility or ... demonstrate the laws of proportion geometrically , Whereas in modern systems , these laws are supposed to have been ...
With Practical Applications, for the Use of Schools Timothy Walker. without demonstrating the possibility or ... demonstrate the laws of proportion geometrically , Whereas in modern systems , these laws are supposed to have been ...
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Elements of Geometry: With Practical Applications, for the Use of Schools Timothy Walker No preview available - 2023 |
Elements of Geometry: With Practical Applications, for the Use of Schools Timothy Walker No preview available - 2019 |
Common terms and phrases
A B C D A B fig adjacent angles axis B A C base and altitude base multiplied bisect called centre chord circ circumference coincide convex surface cube cylinder D E F demonstrated diameter divided draw equally distant equivalent found by multiplying frustum geometry given line gles height Hence homologous sides hundredths inches infinite number infinitely small inscribed angles inscribed circle inscribed sphere intersection line A B line drawn linear unit mean proportional method of Exhaustions number of sides parallel sides perimeter perpendicular polyedrons preceding proposition proved pyramid radii radius ratio regular polygon rence right angle right parallelogram right parallelopiped right triangle semicircumference similar triangles solid angles sphere square feet straight line Suppose tangent tion trapezoid triangles A B C triangles are equal triangular prism vertex vertices
Popular passages
Page ii - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Page xiv - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Page 30 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Page xiv - LET it be granted that a straight line may be drawn from any one point to any other point.
Page 25 - In any proportion, the product of the means is equal to the product of the extremes.
Page 38 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Page 25 - Multiplying or dividing both the numerator and denominator of a fraction by the same number does not change the value of the fraction.
Page xiv - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be taken from equals, the remainders are equal. 4. If equals be added to unequals, the wholes are unequal. 5. If equals be taken from unequals, the remainders are unequal. 6. Things which are double of the same are equal to one another.
Page 42 - The area of a trapezoid is equal to the product of its altitude, by half the sum of its parallel bases.
Page xiv - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together lesi than two right angles...