| 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 - 336 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,... | |
| |