 | Timothy Walker - Geometry - 1829 - 156 pages
...which is made by one straight line meeting another, so as to make the two adjacent angles equal. An Acute, angle is less than a Right angle. An Obtuse angle is greater than a Right angle. Thus when the moving line AB (fig. 9,) F ft has reached that position in which the two adjacent angles... | |
 | Charles Haynes Haswell - Engineering - 1844 - 298 pages
...Right, Acute, or Obtuse. A Right Angle is made by a line perpendicular to another, falling upon it. An Acute Angle is less than a right angle. An Obtuse Angle is greater than a right angle. A Triangle is a figure of three sides. An Equilateral Triangle has all its sides equat. An Isosceles... | |
 | John Thomas Crossley - 1845 - 336 pages
...Angle is that which is made by two oblique lines ; and is either less or greater than a right angle. An Acute Angle is less than a right angle. An Obtuse Angle is greater than a right angle. A Surface or Superficies, is a figure of two dimensions, length and breadth ; but without thickness.... | |
 | John Weale - 1850 - 590 pages
...that which is made by one line perpendicular to another, or when the angles on each side are equal. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. A plane is a surface with which a straight line will every where coincide; and is otherwise called... | |
 | Charles Haynes Haswell - Engineering - 1851 - 346 pages
...Rigkl 4.cute, or Obtuse. A Right Angle is made by a line perpendicular to another, falling upon it An Acute Angle is less than a right angle. - * An Obtuse Angle is greater than a right angle. A Triangle is a figure of three sides. An Equilateral Triangle has all its sides equal. An Isosceles... | |
 | Cornelius S. Cartee - Physical geography - 1855 - 348 pages
...the arc comprehended between the lines that form the angle. 102. A right angle has an arc of 90°. An acute angle is less than a right angle ; an obtuse angle is greater. 103. A leaden ball suspended by a line from any point above the earth's surface will tend towards the... | |
 | Charles Haynes Haswell - Measurement - 1858 - 350 pages
...Right, Acute, or Obtuse. A Right Angle is made by a line perpendicular to another falling upon it. An Acute Angle is less than a right angle. An Obtuse Angle is greater than a right angle. An Arc is any part of the circumference of a circle. A Chord is a right line joining the extremities... | |
 | Cornelius Sowle Cartée - Physical geography - 1861 - 356 pages
...the ate comprehended between the lines that form the angle. 102. A right angle has an arc of 90°. An acute angle is less than a right angle; an obtuse angle is greater. 108. A leaden ball suspended by a line from ariy point above the earth's surface will tend towards... | |
 | Great Britain. Committee on Education - Education - 1864 - 332 pages
...Angle is that which is made by two oblique lines; and is either less or greater than a right angle. An Acute Angle is less than a right angle. An Obtuse Angle is greater than a right angle. A Surface or Superficies, is a figure of two dimensions, length and breadth ; but without thickness.... | |
 | J. J. Hooke - Science - 1870 - 106 pages
...An acute angle is less than a right angle. The complement of an angle is what it wants to complete a right angle. An obtuse angle is greater than a right angle. The supplement of an angle is what it wants of two right angles. A triangle is a figure of three sides,... | |
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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 all sides by lines ; the space included within these lines (if they are straight lines) is called a polygon or... 
