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" A Plane Surface, or a Plane, is a surface in which, if any two points be taken, the straight line joining these points will lie wholly in the surface. "
Practical Work in Geography: For the Use of Teachers and Advanced Pupils ... - Page 261
by Henry McCormick - 1885 - 324 pages
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Elementary Illustrations of the Celestial Mechanics of Laplace: Part the ...

Pierre Simon de Marquis Laplace, Thomas Young - Celestial mechanics - 1821 - 372 pages
...which is neither a straight line, nor composed of straight lines, is a curve line. 62. DEFINITION. A plane is a surface, in which if any two~ points be joined by a straight line, the whole of the straight line will be in the surface. 63. DEFINITION. An...
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The New American Grammar of the Elements of Astronomy: On an Improved Plan ...

James Ryan - Astronomy - 1827 - 408 pages
...lines, is called a curve line 7. A surface is that which has length and breadth without thickness. 8. A plane is a surface, in which if any two points be joined by a straight line, the whole of that line will be in the surface. 9. Every surface which is...
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An Encyclopędia of Architecture: Historical, Theoretical, and Practical

Joseph Gwilt - Architects - 1842 - 1114 pages
...which has length, breadth, and thickness, instance, is a solid, since it is long, broad, and thick. 2. A surface is that which has length and breadth, without thickness. A leaf of paper, though not in strictness, inasmuch as it has thickness, may convey the idea of a surface....
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Elements of Plane Geometry: For the Use of Schools

Nicholas Tillinghast - Geometry, Plane - 1844 - 108 pages
...an- D gle is called an obtuse angle. For EF example, ABC is an acute, and DEF is an obtuse angle. 8. A plane is a surface, in which, if any two points be taken, the straight line drawn between those points will lie wholly in the surface. 9. Straight lines are parallel when they...
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Elementary Course of Geometry ...

Charles William Hackley - Geometry - 1847 - 248 pages
...the angle formed by one of them with a line drawn through any point of it parallel to the other. 2. A plane is a surface in which, if any two points be taken, the straight line which joins these points will be wholly in that surface. 3. A straight line is said to be perpendicular...
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High School Arithemtic: Containing the Elementary and the Higher Principles ...

James B. Dodd - Arithmetic - 1852 - 410 pages
...might be produced. § 3§O. A surface is an extension in length and breadth, without thickness; and a plane is a surface in which if any two points be taken, the straight line which joins them lies wholly in the surface. Polygons. § 381. A plane figure is a bounded plane surface....
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High School Arithmetic

James B. Dodd - 1853 - 398 pages
...might be produced. § 38O. A surface is an extension in length and breadth, without thickness; and a plane is a surface in which if any two points be taken, the straight line which joins them lies wholly in the surface. Polygons. § 381. A plane figure is a bounded plane surface.—A...
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Practical Arithmetic, by Induction and Analysis

Joseph Ray - Arithmetic - 1857 - 348 pages
...everywhere equally distant from each other. 5. A SURFACE has length and breadth, without thickness. 6. A PLANE is a surface, in which, if any two points be taken, the straight line joining them will be wholly in the plane. 7. A FIGURE is a portion of surface inclosed by one or more...
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The National Arithmetic on the Inductive System: Combining the Analytic and ...

Benjamin Greenleaf - Arithmetic - 1857 - 452 pages
...as the angle EEC. BAn obtuse angle is one greater than a right angle ; as the angle FB C. .^ B 605. A surface is that which has length and breadth, without thickness. A plane surface, or simply a plane, is that in which, if any two points whatever be taken, the straight line...
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The National Arithmetic on the Inductive System: Combining the Analytic and ...

Benjamin Greenleaf - Arithmetic - 1858 - 458 pages
...the angle BBC. B An obtuse angle is one greater than a right angle ; s as the angle FB C. v B 605. A surface is that which has length and breadth, without thickness. A plane surface, or simply a plane, is that in which, if any two points whatever be taken, the straight line...
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