 | John Thomas Crossley - 1845 - 336 pages
...without it. A Tangent is a right line which touches but does not cut an arc. Angles are Right or Oblique. A Right Angle is that which is made by one line perpendicular to another. When the angles on each side of a line are equal to one another, they are right angles. An Oblique... | |
 | Anna Cabot Lowell - Astronomical models - 1846 - 122 pages
...thus ". What is an angle ? An angle is the meeting of two lines in a point. What is a right angle ? A right angle is that which is made by one line perpendicular...the angles on each side are equal to one another. What is an acute angle ? An acute angle is less than a right angle. What is an obtuse angle ? An obtuse... | |
 | Charles William Hackley - Geometry - 1847 - 248 pages
...point where the two lines meet is called the vertex of the angle. 11. Angles are Right or Oblique. 12. A Right Angle is that which is made by one line perpendicular to another. Or, when the angles on either side of one line meeting another are equal, they are right angles. 13. Oblique Angles are either... | |
 | Peter Nicholson, Joseph Gwilt - Architectural drawing Technique - 1848 - 750 pages
...one another, meeting in the point, as D. 15. Angles are either right, acute, or oblique, as E. 16. A right angle is that which is made by one line perpendicular to another, orwhen the angles on each side are equal, as F. 17. An acute angle is less than a right angle, as G.... | |
 | Benjamin Greenleaf - Arithmetic - 1850 - 368 pages
...is the inclination, or opening of two lines having different directions, and meeting in a point. 14. A right angle is that which is made by one line perpendicular...side are equal to one another, they are right angles. 13. Angles are right or oblique, acute or obtuse. 15. An oblique angle is one which is made by two... | |
 | John Weale - 1850 - 590 pages
...towards one another in the same plane, meeting in a point. Angles are either right, acute, or oblique. A right angle is that which is made by one line perpendicular...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... | |
 | John Weale - Architecture - 1850 - 600 pages
...towards one another in the same plane, meeting in a point. Angles are either right, acute, or oblique. A right angle is that which is made by one line perpendicular...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... | |
 | Edward Shaw - Architecture - 1852 - 426 pages
...towards one another, meeting in a point, as J. 15. Angles are either right, acute, or oblique, as K. 16. A right angle is that which is made by one line perpendicular...another, or when the angles on each side are equal, as M. 17. An acute angle is less than a right angle, as N,2. 18. An obtuse angle is greater than a... | |
 | Benjamin Greenleaf - Arithmetic - 1853 - 380 pages
...different directions, and meeting in a point. 13. Angles are right or oblique, acute or obtuse. 14. A right angle is that which is made by one line perpendicular...or, when the angles on each side are equal to one an- _ other, they are right angles. 15. An oblique angle is one which is made by two oblique lines,... | |
 | Lucius D. Gould - Carpentry - 1853 - 234 pages
...directions and meeting at the same point, Fig. 9. 14. Angles are right or oblique ; acute or obtuse. 15. A right angle is that which is made by one line perpendicular to another. When the angles on each side are equal to one another, they are right angles, Fig. 11. 16. An oblique... | |
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A Right Angle is that which is made by one line perpendicular to another. Or when the angles on each side are equal to one another, they are right angles. 
