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

Euclid, Thomas Tate - 1849 - 120 pages
...which has an obtuse angle. xxix. An acute angled triangle, is that which has three acute angles. XXX. Of four-sided figures, a square is that which has...angles right angles, but has not all its sides equal. XXXII. A rhombus, is that which has all its sides equal, but its angles are not right angles. XXXIII....

## Elements of Geometry and Conic Sections

Elias Loomis - Conic sections - 1849 - 252 pages
...quadrilaterals, a square is that which has all its sides equal, and its angles right angles. A rectangle is that which has all its angles right [ angles, but has not all its sides equal. A rhombus is that which has all its sides equal, but its angles are not right angles. A parallelogram...

## The Modern Builder's Guide

Minard Lafever - Architecture - 1849 - 306 pages
...equilateral rectangle is one that has all its sides equal. (Fig. 17.) xxv. An oblong rectangle, or an oblong, has all its angles right angles, but has not all its sides equal. (Fig. 18.) NOTE. — An oblong has its opposite sides equal. XXVI. A rhombus has its four sides equal,...

## Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 218 pages
...altitude of BOOK I . Definitions. 48. There are several kinds of quadrilaterals. First. The square, which has all its sides equal, and all its angles right angles. Second. The rectangle, the opposite sides of which are parallel and its angles right angles. Third....

## Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 236 pages
...triangle ACB. 14 BOOK I. Definitions. 48. There are several kinds of quadrilaterals. First. The square, which has all its sides equal, and all its angles right angles. Second. The rectangle, the opposite sides of which are parallel and its angles right angles. Third....

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

Euclides - 1852 - 152 pages
...Fig, 2. is an isosceles acute angled triangle. Fig. 3. is an equilateral acute angled triangle.] XXX. Of four,sided figures, a square is that which has...sides equal, and all its angles right angles. XXXI. 1 An oblong is that which has all its angles right angles, but has not all its sides equal. XXXII....

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

Euclides - 1853 - 146 pages
...which has an obtuse angle. XXIX. An acute-angled triangle is that which has three acute angles. XXX. Of four-sided figures, a square is that which has...angles right angles, but has not all its sides equal. XXXII. A rhombus is that which has all its sides equal, but its angles are not right angles. XXXIII....

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

Euclides - 1853 - 176 pages
...Obtuse-angled. . Acute-angled. XXIX. An acute^angled triangle is that which has three acute angles. XXX. Of four-sided figures, a square is that, which has...its sides equal, and all its angles right angles. Square. Oblong. XXXI. An oblong is that which has all its angles right angles, but has not all its...