Elements of Geometry: With Practical Applications, for the Use of Schools |
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Page 1
... direction . If the pencil be as sharp as possible , this is the nearest approach you can make to a geometrical point , which is defined to be - position merely , without any magni- tude- . But as you cannot represent to the eye that ...
... direction . If the pencil be as sharp as possible , this is the nearest approach you can make to a geometrical point , which is defined to be - position merely , without any magni- tude- . But as you cannot represent to the eye that ...
Page 2
... direction . Accord- ingly we define a straight line to be - the path described by a point moving only in one direction . Thus if the pencil F1 be placed at A ( fig . 1 ) and if it move only in one single direction till it reaches B ...
... direction . Accord- ingly we define a straight line to be - the path described by a point moving only in one direction . Thus if the pencil F1 be placed at A ( fig . 1 ) and if it move only in one single direction till it reaches B ...
Page 4
... direction once or more . When these changes of direction do not take place so often as to prevent your perceiving the intervals A B , BC , C F3 D ( fig . 3 ) between any two successive changes , the line , which is made up of straight ...
... direction once or more . When these changes of direction do not take place so often as to prevent your perceiving the intervals A B , BC , C F3 D ( fig . 3 ) between any two successive changes , the line , which is made up of straight ...
Page 13
... be more remote from the perpendicular than A C. We say that A B is greater than A C. Let A B be supposed to turn about A as a centre till it coincides in direction with A C. The point B will describe the arc B 2 ELEMENTS OF GEOMETRY . 13.
... be more remote from the perpendicular than A C. We say that A B is greater than A C. Let A B be supposed to turn about A as a centre till it coincides in direction with A C. The point B will describe the arc B 2 ELEMENTS OF GEOMETRY . 13.
Page 22
... direction as A C , and since they are equal in length , the point F will fall on C , as E did on B. Then EF and B C , having two points common , cannot differ . The two triangles , therefore , coincide throughout . Accordingly we say ...
... direction as A C , and since they are equal in length , the point F will fall on C , as E did on B. Then EF and B C , having two points common , cannot differ . The two triangles , therefore , coincide throughout . Accordingly we say ...
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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...