 | Peter Nicholson - 1845 - 430 ページ
...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. A plane is a surface with which a straight line will every... | |
 | Joseph Guy - 1845 - 370 ページ
...point where they meet is called the angular point, and the line* AB and AC, are called sides or legs. A Right Angle is that which is made by one line perpendicular...another, or, when the angles on each side are equal to one another, they are right angles ; as the angles M and N (fig. 3.) The measure of a right angle... | |
 | John Thomas Crossley - 1845 - 336 ページ
...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 - 1846 - 122 ページ
...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...another, or when 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... | |
 | Charles William Hackley - 1847 - 248 ページ
...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 - 1848 - 750 ページ
...are produced, as c. 14. An angle is the inclination of two lines towards one another, meeting in the point, as D. 15. Angles are either right, acute, or...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.... | |
 | John Weale - 1850 - 590 ページ
...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 - 1850 - 600 ページ
...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... | |
 | Benjamin Greenleaf - 1850 - 368 ページ
...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...another; or, when the angles on each side are equal to one another, they are right angles. 13. Angles are right or oblique, acute or obtuse. 15. An oblique... | |
 | Edward Shaw - 1852 - 426 ページ
...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...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 right... | |
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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. 
