 | 1912 - 558 pages
...angle, Fig. 42. SURFACES A surface is produced by the motion of a line; it has two dimensions—length and breadth. A plane figure is a plane bounded on...polygon is a plane figure bounded by straight lines. The Fig. 43. Pentagon Fig. 44. Hexagon Fig. 45. Octagon boundary lines are called the sides and the sum... | |
 | Frederick Eugene Turneaure - Civil engineering - 1909 - 456 pages
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth....lines ; the space included within these lines (if ttey are straight lines) ia called a polygon or a rectilinear fyure. TRIANGLES. A triangle is a figure... | |
 | Architecture - 1909 - 468 pages
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth. A plane figure is a plaiie bounded on all sides by lines ; the space included within these lines (if ttçy are straight... | |
 | Victor Tyson Wilson, Carlos Lenox McMaster - Geometrical drawing - 1909 - 204 pages
...mathematical sense, include straight lines as well as curves. A straight line is a curve of infinite radius. A plane figure is a plane bounded on all sides by lines. If the lines are straight, the space which they enclose is called a rectilinear figure, or polygon,... | |
 | Architectural drawing - 1910 - 430 pages
...angle. An obtuse angle is greater than a right angle. SURFACES. A surface is produced by the motion of a line; it has two dimensions, — length and breadth....lines ; the space included within these lines (if tley are straight lines) is called a polygon or a rectilinear figure. TRIANGLES. A triangle is a figure... | |
 | Glenn Moody Hobbs - 1912 - 100 pages
...4. 5. 6. Ans. 648,000 Ans. 2J Ans. 78° 12' 57" Ans. 48° 55' 33" PRACTICAL MATHEMATICS POLYGONS 77. A polygon is a plane figure bounded by straight lines....and the sum of the sides is called the perimeter. Fig. 15. Pentagon. Fig. 16. Hexagon. Fig. 17. Octagon. Polygons are classified according to the number... | |
 | Architecture - 1917 - 550 pages
...obtuse angle is greater than a right angle, Fig. 42. SURFACES A surface is produced by the motion of a line; it has two dimensions — length and breadth....polygon is a plane figure bounded by straight lines. The Fig. 43. Pentagon Fig. 44. Hexagon Fig. 45. Octagon boundary lines are called the sides and the sum... | |
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... angles thus formed are equal they are right angles. When two lines are perpendicular to each other the angles formed are right angles. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. SURFACES. A surface is... 
