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When several angles are at one point B, any ' one of them is expressed by three letters, of which ' the letter that is at the vertex of the angle, that is, at ' the point in which the straight lines that contain the ' angle meet one another, is put between...
The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ... - Σελίδα 10
των Robert Simson - 1775 - 520 σελίδες
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## The First Two Books of the Elements of Euclid ... with Additional Figures ...

Euclides - 1852
...the same straight line. IX. NB " When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

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

Euclides - 1853
...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 letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

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

Euclides - 1853 - 147 σελίδες
...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 letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

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

...angles are at one point B, any one of them is expressed by three letters, of which the letter •.hat is at the vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other e E two letters, and...

## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855
...them is called an angle. NB " When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

## Mensuration of lines, areas, surfaces, and volumes

Robert Rawson - 1856
...angles are at one point B, any one of them is expressed by three letters, of which the letter that is at vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

## APPLETONS' CYCLOPAEDIA OF DRAWING

W.E. WORTHEN - 1857
...lines which meet one another. "When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters : Thus...

## Appletons' Cyclopædia of Drawing: Designed as a Text-book for the Mechanic ...

William Ezra Worthen - 1857 - 410 σελίδες
...lines which meet one another. " When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters : Thus...

## Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1860 - 361 σελίδες
...point, as the angle at E ; but when several angles are at one point B, either of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one...

## The school Euclid: comprising the first four books, by A.K. Isbister

Euclides - 1862
...same straight line. ' NB — ' When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the...vertex of the angle, that is, at the point in which the straight lines containing the angle meet one another, is pat between the other two letters, and one...