 A rectangle is a four-sided figure like a square, in which the sides are perpendicular to each other, but the adjacent sides are not equal. 280. A parallelogram is a foursided figure which has its opposite sides equal and parallel, but its angles not...  Explanatory mensuration for the use of schools - Page 19by Alfred Hiley - 1871Full view - About this book
 | George Crabb - Industrial arts - 1823 - 704 pages
...angles, as EFGH, fig. 14. — A rhomboid is a figure which has its opposite sides equal to each other, but all its sides are not equal, and its angles are not right angles, as OPQN, fig. 16. — A rectangle is any quadrilateral figure whose angles are right angles, such as... | |
 | John Joseph Griffin - Crystallography - 1841 - 538 pages
...90°, as the obtuse angle is greater. — -/), a rhomboid, has its opposite sides equal to one another, but all its sides are not equal, and its angles are not right angles. See the planes P of Model 11. — 7, a trapezium, is a four-sided figure, whose opposite sides are... | |
 | John Joseph Griffin - Crystallography - 1841 - 548 pages
...90°, as the obtuse angle is greater.— -p, a rhomboid, has its opposite tides equal to one another, but all its sides are not equal, and its angles are not right angles. See the planes P of Model 11. — •/, a trapezium, is a four-sided figure, whose opposite sides are... | |
 | Charles Davies - Arithmetic - 1847 - 368 pages
...the sides are perpendicular to each other, but the adjacent sides are not equal. 280. A parallelogram is a foursided figure which has its opposite sides equal and parallel, but its angles not right angles. The line DE, perpendicular to the base, is called the altitude. AE 281.... | |
 | Charles Davies - Arithmetic - 1847 - 368 pages
...the sides are perpendicular to each other, but the adjacent sides are not equal. 280. A parallelogram is a foursided figure which has its opposite sides equal and parallel, but its angles not right angles. The line DE, perpendicular to the base, is called the altitude. D_ I AE... | |
 | Charles Davies - Arithmetic - 1850 - 412 pages
...the adjacent sides are not equal. * All the references are to Davies* Legendre. 328. A parallelogram is a four-sided figure which has its opposite sides equal and parallel, but its angles not rightangles. The line DE, perpendicular to the base, is called the altitude. 329. To... | |
 | Charles Davies - 1852 - 344 pages
...sides are perpendicular to each other, but the adjacent sides are not equal. 31.7. A parallelogram is a four-sided figure which has its opposite sides equal and parallel, but its angles not right angles. The line DE, perpendicular to the base, is called the altitude. E 320.... | |
 | Charles Davies - Arithmetic - 1852 - 422 pages
...hypothenuse ? What is the area of a triangle equal to « 327. What is a rectangle ? 328. A parallelogram is a four-sided figure which has its opposite sides equal and parallel, but its angles not rightangles. The line DE, perpendicular to the base, is called the altitude. ^ 329.... | |
 | Euclides - Geometry - 1853 - 334 pages
...right angles. <- ' XXXIII. A rhomboid is a four-sided figure which has its opposite sides equal, /~ but all its sides are not equal, and / its angles are not right angles. XXXIV. Trapeziums are such four-sided figures as are not included in the four preceding definitions.... | |
 | Charles Davies - Arithmetic - 1863 - 346 pages
...the sides are perpendicular to each other, but the adjacent sides are not equal. 390. A PARALLELOGRAM is a four-sided figure which has its opposite sides equal and parallel, but its angles not right angles. The" line DE, perpendicular to the base, is called, the altitude. 391.... | |
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