Books Books
A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
The First Six Books with Notes - Page 145
by Euclid - 1822 - 179 pages

## Mathematical Questions and Solutions, Volume 42

Mathematics - 1885 - 150 pages
...The simplest figures, bounded by lines alone, are on a plane superficics, and this is defined as " that in which, any two points being taken, the straight...line between them lies wholly in that superficies." But it is of importance to observe that a line is "length without breadth," that a superficics is "...

## Mathematical Questions and Solutions, from the "Educational Times ..., Volume 42

W. J. C. Miller - Mathematics - 1885 - 154 pages
...figure. The simplest figures, bounded by lines alone, are on a plane superficies, and this is denned as " that in which, any two points being taken, the straight...line between them lies wholly in that superficies." But it is of importance to observe that a line is "length without breadth," that a superficies is "that...

## The American Practical Navigator: Being an Epitome of Navigation and ...

Nathaniel Bowditch - Nautical astronomy - 1888 - 704 pages
...straight or rig/it line is the shortest distance between two points on a plane surface. A flaue surface is that in which any two points being taken, the straight line between them lies wholly in that surface. Parallel lines are. such as are in the same plane, and if extended infinitely never meet....

## The Harpur Euclid: An Edition of Euclid's Elements

Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...Superficies is that which has only length and breadth. 6. The Extremities of a Superficies are lines. 7. A Plane Superficies is that in which any two points...line between them lies wholly in that superficies. 8. A Plane Angle is the inclination of two lines to one another in a plane, which meet together, but...

## Practical Plane and Solid Geometry, Including Graphic Arithmetic

Isaac Hammond Morris - Geometry, Plane - 1890 - 440 pages
...— upon a plane surface. A plane surface is perfectly level, and is defined by Euclid as ' a surface in which, any two points being taken, the straight line between them lies wholly in that surface.' Henrici calls it 'the path of a moving line.' These representations are effected by means...

## Practical Plane Geometry: Giving the Simplest Modes of Constructing Figures ...

John Fry Heather - Geometry, Modern - 1890 - 252 pages
...line drawn close along such an edge will also be straight.* 11. A piano or flat surface is that on which any two points being taken, the straight line between them lies wholly in the surface. Hence to test the flatness of a surface, a straight edge is to be laid upon it, aitd if...

## Bizarre; Notes and Queries; a Monthly Magazine of History, Folk ..., Volumes 7-8

1890 - 580 pages
...straight line, on the whole being turned about the two centres of the spheres, will describe a surface in which any two points being taken, the straight line between them, with its prolongation either way, may be demonstrated to lie wholly in that surface. A surface of this...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - Geometry - 1892 - 460 pages
...length and breadth, but no thickness. The boundaries of a surface are lines. 5. A plane surface is one in which any two points being taken, the straight line between them lies wholly in that surface. A plane surface is frequently referred to simply as a plane. NOTE. Euclid regards a point...