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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. "
A Course of Mathematics ...: Composed for the Use of the Royal Military ... - Page 264
by Charles Hutton - 1811
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The Mechanic's Calculator: Comprehending Principles, Rules, and Tables in ...

William Grier - Mechanical engineering - 1842 - 320 pages
...different directions, and meeting in a point. 14. Angles are Right or Oblique, Acute or Obtuse. 15. A Right Angle is that which is made by one line perpendicular...side are equal to one another, they are right angles. 10. An Oblique Angle is that which is made by two oblique lines ; and is either less or greater than...
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A Dictionary of the Military Science: Containing an Explanation of the ...

E. S. Norman Campbell - English language - 1844 - 314 pages
...the range of the shot, or the horizontal right line which measures the distance it has passed. Might angle. Is that which is made by one line perpendicular to another; it is always 90° or the quadrant of a circle, DAB. angle, ie less than 90°. Vide BAC. Acute angle....
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Guy's Elements of Astronomy, and an Abridgement of Keith's New Treatise on ...

Joseph Guy - Astronomy - 1845 - 370 pages
...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...side are equal to one another, they are right angles ; as the angles M and N (fig. 3.) The measure of a right angle is a quadrant of 90 degrees. An Acute...
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The Mechanic's Companion, Or, The Elements and Practice of Carpentry ...

Peter Nicholson - Geometry - 1845 - 430 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. A plane is a surface with which a straight line will every...
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Crossley's Comprehensive class book

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...
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Elements of Astronomy: Designed as an Introduction to the Study

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...
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Elementary Course of Geometry ...

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...
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Principles of Architecture: Comprising Fundamental Rules of the Art, with ...

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....
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The National Arithmetic on the Inductive System: Combining the Analytic and ...

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...
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Rudimentary Dictionary of Terms Used in Architecture, Civil ..., Volumes 1-2

John Weale - Architecture - 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...
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