 | 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... | |
 | Great Britain. Admiralty - Geometry - 1846 - 128 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... | |
 | Euclid, John Playfair - Euclid's Elements - 1846 - 334 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... | |
 | 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.... | |
 | 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... | |
 | 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... | |
 | 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... | |
 | 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... | |
 | William Templeton (engineer.) - 1848 - 256 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.... | |
 | George Clinton Whitlock - Mathematics - 1848 - 338 pages
...21°. Of all spherical polygons having the same number of sides and the same perimeter, the greatest is that which has all its sides equal and all its angles equal. 22°. Spherical pyramids, which stand upon equal bases, are equal to one another ; so, likewise,... | |
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An oblong is that which has all its angles right angles, but has not all its sides equal. 
