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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 ... - 25 ページ
John Gummere 著 - 1814 - 346 ページ

## The Elements of Geometry, Symbolically Arranged

...inclination of two lines to one another in a plane, which meet together, but are not in the same direction. A plane rectilineal angle is the inclination of two straight lines to B one another, which meet together, but are not in the same straight line. NB When several angles are...

## The first book of Euclid's Elements, simplified, explained and illustrated ...

Euclides - 1847
...accurate notion of their difference. The one is an external edge, the other an internal inclination. 9. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. NB — When several angles meet at a A point, each of them is indicated by three letters, of which...

## The definitions, postulates, axioms, and enunciations of the propositions of ...

Euclides - 1848
...inclination of two lines to each other in a plane which meet together, but 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. X. When a straight line standing on another straight line, makes the adjacent angles equal to each...

## Lessons on the delineation of form

Charles Richson - 1848
...the horizontal. The angle on each side of the perpendicular is a right angle, DEFINITIONS.* — 1. "A plane rectilineal angle is the inclination of two...together, but are not in the same straight line." 2. "When a straight line standing on another straight line makes the adjacent angles equal to each...

## The first three books of Euclid's Elements of geometry, with theorems and ...

Euclides, Thomas Tate - 1849 - 108 ページ
...of 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. NB "When several angles are at one point B, anyone of them is expressed by three letters, of which...

## A Manual of Surveying for India, Detailing the Mode of Operations on the ...

Sir Henry Edward Landor Thuillier - 1851 - 718 ページ
...in which any two points being taken, the straight line between them lies wholly in that superficies. A plane rectilineal angle is the inclination of two...together, but are not in the same straight line.* When a straight line standing upon another straight line makes the adjacent angles equal to one another,...

## The first two books of the Elements of Euclid, with additional figures ...

Euclides - 1852
...same direction." [Fig. 1., plane rectilineal angle; Jig. 2., plane angle, not rectilineal.] Fig. 1. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. IX. NB " When several angles are at one point B, any one of them is expressed by three letters, of...

## The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853
...of 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. NB "When several angles are at one point B, any one of them is expressed by three letters, of which...

## The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

...of two lines to one another in a plane, which meet together, but are not in the same direction. 9. A plane rectilineal angle is the inclination of two...meet together, but are not in the same straight line. When several angles are at one point B, any one of them is expressed by three letters, of which the...

## The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 147 ページ
...of 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. * NB — When several angles are at one point b, any one of them is expressed by three letters, of...