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" ... ellipse is a curve generated by a point moving in a plane so that the sum of its distances from two fixed points in that plane is constant. "
Elements of Mechanical Drawing: The Use of Instruments, Theory of Projection ... - Page 50
by Gardner Chace Anthony - 1904 - 152 pages
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The Elements of Plane Analytic Geometry: A Text-book Including Numerous ...

George Russell Briggs - Geometry, Analytic - 1881 - 174 pages
...so that the difference of its distances from two fixed points in that plane is constant. A parabola is a curve generated by a point moving in a plane so that at each instant its distances from a fixed point and a fixed line in that plane are equal. These three...
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Report of the Chief Signal Officer, United States Army, to the Secretary of War

United States. Army. Signal Corps - 1883 - 1158 pages
...0 the equation of the normal. Examples. LECTURE No. XI. (February 14, 1882.) ANALYTIC GEOMETRY. An ellipse is a curve generated by a point moving in a plane so that at each instant the sum of its distances from two fixed points in that plane is constant. An hyperbola...
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Junior Course in Mechanical Drawing

William Henry Thorne - Mechanical drawing - 1890 - 76 pages
...be approximated by this method with sufficient accuracy for practical purposes. FIG. 33. A PARABOLA is a curve generated by a point moving in a plane so that its distance from a given point shall be constantly equal to Us distance from a given line. The given...
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The Elements of Plane Analytic Geometry: A Text-book Including Numerous ...

George Russell Briggs - 1890 - 170 pages
...so that the difference of its distances from two fixed points in that plane is constant. A parabola is a curve generated by a point moving in a plane so that at each instant its distances from a fixed point and a fixed line in that plane are equal. These three...
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The Elements of Plane Analytic Geometry: A Text-book, Including Numerous ...

George Russell Briggs - 1899 - 186 pages
...so that the difference of its distances from two fixed points in that plane is constant. A parabola is a curve generated by a point moving in a plane so that at each instant its distances from a fixed point and a fixed line in that plane are equal. These three...
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Descriptive Geometry: With Numerous Problems and Practical ..., Volume 1

William Shaffer Hall - Geometry, Descriptive - 1902 - 160 pages
...required tangent joins the points / and c. (For proof, see "Analytical Geometry.") 21. The ellipse may be generated by a point moving in a plane, so that the sum of its distances from two given points, called foci, shall always be equal to a given line. PROB. 96....
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Practical Mechanical Drawing and Machine Design, Self Taught ...

Charles Westinghouse - Machine design - 1906 - 168 pages
...before, thereby obtaining the elliptical arc FD. Construct opposite side in the same manner. The Parabola is a curve generated by a point moving in a plane so that its distance from a RB Tig. 129— The Parabola. fixed point shall be constantly equal to its distance...
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An Introduction to the Graphic Language: The Vocabulary, Grammatical ...

Gardner Chace Anthony - Mechanical drawing - 1922 - 194 pages
...points in the required curve. In like manner obtain the opposite side. 115. The Hyperbola. — Fig. 181 is a curve generated by a point moving in a plane, so that the difference of the distances from this point to two fixed points shall be constant. It will be observed...
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Descriptive Geometry: With Numerous Problems and Practical Applications

William Shaffer Hall - Geometry, Descriptive - 1922 - 138 pages
...required tangent joins the points t and c. (For proof, see "Analytical Geometry.") 21. The ellipse may be generated by a point moving in a plane, so that the sum of its distances from two given points, called foci, shall always be equal to a given line. PROB. 96....
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An Introduction to the Graphic Language: The Vocabulary, Grammatical ...

Gardner Chace Anthony - Mechanical drawing - 1922 - 188 pages
...use this method when the major axis is more than twice the minor. 112. The Parabola. — Fig. 179, is a curve generated by a point moving in a plane so that its distance from a fixed point FIG. 177. ELLIPSE c FIG. 178. ELLIPSE 137 OA FIG. 179. PARABOLA I 2...
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