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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 ... - Page 10
by Robert Simson - 1775 - 520 pages

## Elements of Arithmetic, Algebra, and Geometry

George Lees - 1826 - 276 pages
...the same straight line. B 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...

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

Euclid, John Playfair - Euclid's Elements - 1826 - 326 pages
...is at the ver-- 'tex of the angle, that is, at the point in whieh the straight lines that ' eontain the angle meet one another, is put between the other two 'letters, and one of these two is somewhere upon one of those straight 'lines, and ihe other upon the other line: Thus the...

## The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - Trigonometry - 1827 - 546 pages
...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...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...

## Geometry Without Axioms; Or the First Book of Euclid's Elements. With ...

Thomas Perronet Thompson - Euclid's Elements - 1833 - 168 pages
...the nearest road, direct. When several direct 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 from which the straight lines that make the angle, proceed], is put in the middle, and one of the remaining...

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

Euclid - 1835 - 540 pages
...straight line. Book I. -CE NB ' Wheir 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...

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

John Playfair - Euclid's Elements - 1835 - 336 pages
...same straight line. A IB C NB ' When several angles are at one point B, any one of them is ex' pressed by three letters, of which the letter that is at the vertex of the an' gle, that is. at the point in which the straight lines that contain the angle ' meet one another,...

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

John Playfair - Euclid's Elements - 1837 - 332 pages
...the same straight line. E NB 'When several angles are atone point B, any one of them is ex' pressed by three letters, of which the letter that is at the vertex of the an' gle, that is, at the point in which the straight lines that contain the angle ' meet one another,...

## Elements of Plane Geometry According to Euclid

Andrew Bell - Euclid's Elements - 1837 - 290 pages
...at one point B, any one of them is expressed by three letters, of which the letter that is at tire 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...