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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.
A Treatise on Surveying, Containing the Theory and Practice: To which is ... - Page 25
by John Gummere - 1814 - 346 pages

## Logic, or the Art of Reasoning simplified, etc

S. E. PARKER - Logic - 1838 - 340 pages
...impart. When we, on first opening the pages of Euclid, read, " a line is length without breadth ;" " a plane rectilineal angle is the inclination of two straight lines to one another that meet in a point ;" " that a triangle is a plane figure bounded by three lines," &c. ; from hence...

## Euclid's Elements [book 1-6] with corrections, by J.R. Young

Euclides - 1838 - 264 pages
...he posited in the surface. B2 VII. A plane rectilineal angle is the inclination of two straight Hues to one another, which meet together, but are not in the same straight line. It is better to say that a plane rectilineal angle, or simply a rectili. neal angle, it the opening...

## The Elements of Euclid; viz. the first six books,together with the eleventh ...

Euclides - Geometry - 1841 - 378 pages
...two lines to one " another in a plane, which meet together, but are " not in the same direction." IX. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. A NB ' When several angles aro at one point B, any ' one of them is expressed by three letters, of...

## Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842 - 316 pages
...lines to one another " in a plane : the lines meeting, but not lying in the same " direction." IX. A plane rectilineal angle is the inclination of two straight lines to one another ; the lines meeting, but not lying in the same direction. NB ' When several angles are at one point...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Euclid's Elements - 1842 - 332 pages
...meeting of the other lines than straight lines. A plane angle is said to be "the inclination of two lines to one another which " meet together, but are not in the same direction." This definition is omitted here, because that the angles formed by the meeting of curve...

## A course of practical geometry for mechanics

William Pease - Geometry - 1843 - 80 pages
...not in the same direction.'' Plane Angles are either Rectilineal, Curvilineal, or Mixtilineal. IX. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. NB ' When several angles are at one point B, any ' one of them is expressed by three letters, of which...

## Euclid in Paragraphs: The Elements of Euclid: Containing the First Six Books ...

Euclid - Geometry - 1845 - 218 pages
...two lines to one " another in a plane, which meet together, but are not " in the same direction." IX. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. BC NB ' When several angles are at one point B, any one ' of them is expressed by three letters, of...

## Euclid's Elements of geometry [book 1-6, 11,12] with explanatory notes ...

Euclides - 1845 - 546 pages
...two lines to each other in a plane which meet together, but are not in the same straight line. IX. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. D b C NB When several angles are at one point II, either of them is expressed by three letters, of...