Books Books
An oblong is that which has all its angles right angles, but has not all its sides equal.
Mensuration of lines, areas, surfaces, and volumes - Page xv
by Robert Rawson - 1856

## The Elements of Euclid: With Many Additional Propositions ..., Part 1

Euclid - Geometry - 1853 - 176 pages
...the line AB. SCHOLIUM. The definition of a square, as given by Euclid, viz. " a four-sided figure, which has all its sides equal, and all its angles right angles" is more than sufficient, and really involves a theorem. It is only necessary to state (d) Constr. (e)...

## Orr's Circle of the Sciences: Organic nature, vols. 1-3 (1854-1856)

William Somerville Orr - Science - 1854 - 532 pages
...than a right angle. An acute-angled triangle has each of its angles acute, or less than a right angle. Of four-sided figures, a square is that which has...its sides equal, and all its angles right angles. If the four sides are equal, and only one of the angles affirmed to be right, the other three angles...

## Elements of geometry and mensuration

Thomas Lund - Geometry - 1854 - 522 pages
...notions and principles. For example, in the former Part a square was defined to be "a parallelogram, which has all its sides equal and all its angles right angles"; in this Part such a construction is required to be actually made under certain given circumstances....

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

Euclides - 1855 - 262 pages
...two preceding species of triangles have each two acute angles, as will be shown in the sequel. XXX. Of four-sided figures, a square is that which has...its sides equal, and all its angles right angles. This definition is redundant. If the general definition annexed to the 34th Prop, of this book be considered,...

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

John Playfair - Geometry - 1855 - 336 pages
...sided figures, a square is that which has all its sides equal and all its angles right angles. 26. An oblong is that which has all its angles right angles, but has not a]] its sides equal. 27. A rhombus is that which has all its sides equal, but its angles are not right...

## A Treatise on Arithmetic ...

Noble Heath - Arithmetic - 1846-1880 - 1855 - 468 pages
...having all its angles right angles, hut only its opposite sides equal. 107. The Pythagorean Tahle, which has all its sides equal, and all its angles right angles, is a square. As the divisions of its sides are also equal, suppose each to be 1 inch long : then, as...

## Mechanics and Engineers Book of Reference and Engineers Field Book

Charles Haslett - Engineering - 1856 - 530 pages
...inches, <fcc, | Mensuration of Superficies. Square. Rectangle. :B A SQUARE is a quadrilateral figure, which has all its sides equal, and all its angles right angles. A RECTANGLE is a four-sided figure, which has its angles, right angles, and its opposite sides parallel....

## A Treatise on Arithmetic: Through which the Entire Science Can be Most ...

Noble Heath - Arithmetic - 1856 - 472 pages
...having all its angles right angles, hut only its opposite sides equal. 107. The Pythagorean Table, which has all its sides equal, and all its angles right angles, is a square. As the divisions of its sides are also equal, suppose each to he 1 inch long : then, as...