 | Joseph Ray - Arithmetic - 1877 - 350 pages
...or curved. Thus, the surface of a table or floor is plane; that of a ball or pflobe is curved. 11. A plane figure is a portion of a plane surface bounded by one or more lines. 12. A polygon is a plane figure bounded by straight lines. REM. — Tbe straight... | |
 | Frederic William Bardwell - Arithmetic - 1878 - 416 pages
...since they can neither converge nor diverge, and it may be shown that they must both be in one plane. A plane figure is a portion of a plane surface bounded by straight or curved lines. A polygon is a plane figure bounded by straight lines. Polygons may have any number of sides greater... | |
 | Horatio Nelson Robinson - 1875 - 472 pages
...each other. 711. An Obtuse Angle is greater than a right angle. ""X MENSURATION. PLANE FIGURES. 7 1 3. A Plane Figure is a portion of a plane surface bounded by straight or curved lines. 714. A Polygon is a plane figure bounded by straight lines. 715. The Perimeter of a polygon is the... | |
 | Daniel W. Fish - Arithmetic - 1881 - 542 pages
...a right angle. Horizontal. All angles ezcept right angles are called oblique angles. PLANE FIGUBES. 866. A Plane Figure is a portion of a plane surface...The Perimeter of a polygon is the sum of its sides. 86t>. The Area of a plane figure is the surface included within the lines which bound it. (46O.) A... | |
 | Daniel W. Fish - Arithmetic - 1883 - 348 pages
...form the two right angles ACD and DCB. 211. A surface has two dimensions, length and breadth. 212. A plane figure is a portion of a plane surface bounded by straight or curved lines. 213. A rectangle is a plane figure bounded by four straight lines, having four right angles. ' Rtcun9ie.... | |
 | Daniel W. Fish - Arithmetic - 1883 - 364 pages
...right angles ACD and DCB. 211. A surface has two dimensions, length and breadth. 212. A plane flr/itre is a portion of a plane surface bounded by straight or curved lines. 213. A rectanale is a plane figure bounded by four straight lines, having four right angles. ' Rectangle.... | |
 | George Albert Wentworth, George Anthony Hill - Arithmetic - 1887 - 448 pages
...lines can be drawn in all directions. The surface of still water is a good example of a plane surface. A Plane Figure is a portion of a plane surface bounded by lines. The Area of a plane figure is the ratio of its magnitude to that of another plane figure assumed... | |
 | Charles Austin Hobbs - Arithmetic - 1889 - 366 pages
...right angle is called an obtuse angle, and an angle less than a right angle is called an acute angle. A plane figure is a portion of a plane surface bounded by straight or curved lines. A polygon is a plane figure bounded by straight lines ; the lines are called the sides of the polygon.... | |
 | Horatio Nelson Robinson - Arithmetic - 1892 - 428 pages
...than a right angle. An acute angle may be any number of degrees less than 90°. PLANE FIGURES. 492. A Plane Figure is a portion of a plane surface bounded by straight or curved lines. 493. A Polygon is a plane figure bounded by straight Hues. 494. The Perimeter of a polygon is the sum... | |
 | Horatio Nelson Robinson - Arithmetic - 1892 - 428 pages
...become a straight line. 491. An Acute Angle is less than a right angle. Horizontal. PLANE FIGURES. 492. A Plane Figure is a portion of a plane surface bounded by straight or curved lines. 493. A Polygon is a plane figure bounded by straight lines. 494. The Perimeter of a polygon is the... | |
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A Plane Figure is a portion of a plane surface bounded by straight or curved lines. 
