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 ## A course of practical geometry for mechanics

W. PEASE - 1846 - 86 pages
...will necessarily be acute. 54*. An Acute-angled Triangle is that which has three acute angles. 55*. Of four-sided figures, a square is that which has...its sides equal, and all its angles right angles. 56*. An oblong is that which has all its angles right angles, but has not all its sides equal. Its... ## The Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 130 pages
...four-sided figures, a square is that which has all its angles right angles, and all its sides equal. XXXI. An oblong is that which has all its angles right angles, but has not all its sides equal. XXXII. XXXIII. A rhomboid is that which has its opposite sides equal to one / another, but all its... ## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

Euclid, John Playfair - Euclid's Elements - 1846 - 332 pages
...obtuse angle. 24. An acute angled triangle is that which has three acute angles. 25. Of four 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 all its sides equal. 28. A... ## Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - Geometrical drawing - 1846 - 254 pages
...altitude. Thus, AC is the altitude. 9. Name the different kinds of quadrilaterals. First. — The square, which has all its sides equal, and all its angles right angles. Second. — The rectangle, which has its angles right angles, and its opposite sides equal and parallel.... ## The First Book of Euclid's Elements, Simplified, Explained, and Illustrated ...

Euclides - 1847 - 128 pages
...that which has an obtuse angle. 28. An acute.angled triangle is that which has three acute angles. 29. Of four.sided figures, a square is that which has...its sides equal, and all its angles right angles. 30. An oblong is that which has all its angles right angles, but has not all its sides equal. Called... ## An Essay Upon the Study of Geometry in Common Schools

Stephen Chase - Geometry - 1847 - 28 pages
...before any demonstration of the properties of quadrilaterals, the square is defined as "a quadrilateral, which has all its sides equal, and all its angles right angles " ; the rectangle, as one " which has its opposite sides equal, and its angles right angles " ; the... ## First Lessons in Geometry: Upon the Model of Colburn's First Lessons in ...

Alpheus Crosby - Geometry - 1847 - 190 pages
...before any demonstration of the properties of quadrilaterals, the square is defined as "a quadrilateral, which has all its sides equal, and all its angles right angles " ; the rectangle, as one " which has its opposite sides equal, and its angles right angles " ; the... ## The definitions, postulates, axioms, and enunciations of the propositions of ...

Euclides - 1848 - 52 pages
...triangle is that which has an obtuse angle. XXIX. XXX. Of quadrilateral or four-sided figures, a square has all its sides equal and all its angles right angles....angles right angles, but has not all its sides equal. XXXII. A rhombus has all its sides equal, but its angles are not right angles. XXXIII. A rhomboid has... ## The millwright & engineer's pocket companion

William Templeton (engineer.) - 1848 - 258 pages
...OF SUPERFICIES. Square. Rectangle. A s A Rhomboid. -/T7 D cai) ca 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.... 