 | 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... | |
 | 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... | |
 | John Charles Snowball - Hydrostatics - 1838 - 114 pages
...direction). CHAPTER II. THfe LEVER. 16. DEFS. (l) A PLANE, or A PLANE SUPERFICIES, is that superficies, or surface, in which if any two points be taken the straight line joining them lies wholly within the superficies. (EUCLID i; Def. 7.) (2) A SOLID is that which hath length,... | |
 | 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... | |
 | 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... | |
 | 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.... | |
 | 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... | |
 | Euclides - Geometry - 1853 - 334 pages
...and breadth, but not thickness. VI. The extremities of a surface are lines. VII. A plane surface or plane is a surface, in which, if any two points be taken, the straight line of which they are the extremities, lies wholly in that surface, ie every point in the straight line... | |
 | 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 boundaries.... | |
 | Thomas Lund - Hydrostatics - 1864 - 188 pages
...string? CHAPTER II. THE LEVER. 17. DBFS, (i) A PLANE, OR A PLANE SUPERFICIES, is that superficies, or surface, in which, if any two points be taken, the straight line joining them lies wholly within the superficies. EUCLID, i. Def. 7. (s) A SOLID is that which hath length,... | |
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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. 
